node_modules give errors in Windows and not Linux/Mac OS

1. Clone this repo https://github.com/massimonewsuk/flow-windows-issue
2. Run npm install
3. Run npx flow

On Linux systems and Mac OS, you won't get any errors.

On Windows (specifically `Windows 10 x64 Version 10.0.16299 Build 16299`), you will get errors like the following:
```
Error ----------------------------------------------------------- node_modules/graphql/error/GraphQLError.js.flow:178:62

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

178| value: extensions || (originalError && (originalError: any).extensions),
^^^

Error ----------------------------------------------------------- node_modules/graphql/error/GraphQLError.js.flow:200:16

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

200| (GraphQLError: any).prototype = Object.create(Error.prototype, {
^^^

Error ------------------------------------------------------------ node_modules/graphql/error/locatedError.js.flow:27:28

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

27| return (originalError: any);
^^^

Error ------------------------------------------------------------ node_modules/graphql/error/locatedError.js.flow:32:39

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

32| (originalError && (originalError: any).nodes) || nodes,
^^^

Error ------------------------------------------------------------ node_modules/graphql/error/locatedError.js.flow:33:38

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

33| originalError && (originalError: any).source,
^^^

Error ------------------------------------------------------------ node_modules/graphql/error/locatedError.js.flow:34:38

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

34| originalError && (originalError: any).positions,
^^^

Error ------------------------------------------------------------- node_modules/graphql/execution/execute.js.flow:10:10

Dependencies of a `@flow strict` module must also be `@flow strict`! (`nonstrict-import`)

10| import { forEach, isCollection } from 'iterall';
^^^^^^^

Error ------------------------------------------------------------- node_modules/graphql/execution/execute.js.flow:10:19

Dependencies of a `@flow strict` module must also be `@flow strict`! (`nonstrict-import`)

10| import { forEach, isCollection } from 'iterall';
^^^^^^^^^^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:101:39

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

101| fieldResolver: GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:101:44

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

101| fieldResolver: GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:123:41

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

123| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:123:46

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

123| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:150:41

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

150| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:150:46

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

150| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:300:40

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

300| fieldResolver: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:300:45

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

300| fieldResolver: ?GraphQLFieldResolver,
^^^

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:310:14

Sketchy null check on string [1] which is potentially an empty string. Perhaps you meant to check for null or
undefined [2]? (`sketchy-null-string`)

node_modules/graphql/execution/execute.js.flow:310:14
310| if (!operationName && operation) {
^^^^^^^^^^^^^

References:
node_modules/graphql/execution/execute.js.flow:299:19
299| operationName: ?string,
^^^^^^ [1]
node_modules/graphql/execution/execute.js.flow:299:18
299| operationName: ?string,
^^^^^^^ [2]

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:313:12

Sketchy null check on string [1] which is potentially an empty string. Perhaps you meant to check for null or
undefined [2]? (`sketchy-null-string`)

node_modules/graphql/execution/execute.js.flow:313:12
313| !operationName ||
^^^^^^^^^^^^^

References:
node_modules/graphql/execution/execute.js.flow:299:19
299| operationName: ?string,
^^^^^^ [1]
node_modules/graphql/execution/execute.js.flow:299:18
299| operationName: ?string,
^^^^^^^ [2]

Error ------------------------------------------------------------- node_modules/graphql/execution/execute.js.flow:326:9

Sketchy null check on string [1] which is potentially an empty string. Perhaps you meant to check for null or
undefined [2]? (`sketchy-null-string`)

node_modules/graphql/execution/execute.js.flow:326:9
326| if (operationName) {
^^^^^^^^^^^^^

References:
node_modules/graphql/execution/execute.js.flow:299:19
299| operationName: ?string,
^^^^^^ [1]
node_modules/graphql/execution/execute.js.flow:299:18
299| operationName: ?string,
^^^^^^^ [2]

Error ------------------------------------------------------------ node_modules/graphql/execution/execute.js.flow:782:53

Sketchy null check on mixed [1] which is potentially false. Perhaps you meant to check for null or undefined [1]?
(`sketchy-null-mixed`)

node_modules/graphql/execution/execute.js.flow:782:53
782| return error instanceof Error ? error : new Error(error || undefined);
^^^^^

References:
node_modules/graphql/execution/execute.js.flow:781:33
781| function asErrorInstance(error: mixed): Error {
^^^^^ [1]

Error ----------------------------------------------------------- node_modules/graphql/execution/execute.js.flow:1021:20

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

1021| forEach((result: any), (item, index) => {
^^^

Error ----------------------------------------------------------- node_modules/graphql/execution/execute.js.flow:1308:57

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

1308| export const defaultFieldResolver: GraphQLFieldResolver = function(
^^^

Error -------------------------------------------------------------- node_modules/graphql/execution/values.js.flow:18:10

Importing from an untyped module makes it `any` and is not safe! Did you mean to add `// @flow` to the top of
`../language/printer`? (`untyped-import`)

18| import { print } from '../language/printer';
^^^^^

Error ----------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:58:41

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

58| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ----------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:58:46

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

58| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ----------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:69:41

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

69| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ----------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:69:46

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

69| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ---------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:123:41

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

123| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ---------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:123:46

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

123| fieldResolver?: ?GraphQLFieldResolver,
^^^

Error ----------------------------------------------------------------------- node_modules/graphql/graphql.js.flow:157:7

Sketchy null check on mixed [1] which is potentially false. Perhaps you meant to check for null or undefined [1]?
(`sketchy-null-mixed`)

157| if (result.then) {
^^^^^^^^^^^ [1]

Error ------------------------------------------------------------ node_modules/graphql/jsutils/instanceOf.js.flow:21:32

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

21| function instanceOf(value: any, constructor: any) {
^^^

Error ------------------------------------------------------------ node_modules/graphql/jsutils/instanceOf.js.flow:21:50

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

21| function instanceOf(value: any, constructor: any) {
^^^

Error ------------------------------------------------------------ node_modules/graphql/jsutils/instanceOf.js.flow:48:32

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

48| function instanceOf(value: any, constructor: any) {
^^^

Error ------------------------------------------------------------ node_modules/graphql/jsutils/instanceOf.js.flow:48:50

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

48| function instanceOf(value: any, constructor: any) {
^^^

Error -------------------------------------------------------------- node_modules/graphql/jsutils/invariant.js.flow:12:8

Sketchy null check on mixed [1] which is potentially false. Perhaps you meant to check for null or undefined [1]?
(`sketchy-null-mixed`)

node_modules/graphql/jsutils/invariant.js.flow:12:8
12| if (!condition) {
^^^^^^^^^

References:
node_modules/graphql/jsutils/invariant.js.flow:10:46
10| export default function invariant(condition: mixed, message: string) {
^^^^^ [1]

Error -------------------------------------------------------------- node_modules/graphql/jsutils/memoize3.js.flow:13:42

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

13| export default function memoize3 any>(
^^^

Error -------------------------------------------------------------- node_modules/graphql/jsutils/memoize3.js.flow:13:51

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

13| export default function memoize3 any>(
^^^

Error -------------------------------------------------------------- node_modules/graphql/jsutils/memoize3.js.flow:13:60

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

13| export default function memoize3 any>(
^^^

Error -------------------------------------------------------------- node_modules/graphql/jsutils/memoize3.js.flow:13:68

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

13| export default function memoize3 any>(
^^^

Error -------------------------------------------------------------- node_modules/graphql/jsutils/memoize3.js.flow:43:21

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

43| return (memoized: any);
^^^

Error ------------------------------------------------------ node_modules/graphql/language/blockStringValue.js.flow:36:7

Sketchy null check on number [1] which is potentially 0. Perhaps you meant to check for null or undefined [2]?
(`sketchy-null-number`)

node_modules/graphql/language/blockStringValue.js.flow:36:7
36| if (commonIndent) {
^^^^^^^^^^^^

References:
node_modules/graphql/language/blockStringValue.js.flow:29:22
29| commonIndent = indent;
^^^^^^ [1]
node_modules/graphql/language/blockStringValue.js.flow:21:22
21| let commonIndent = null;
^^^^ [2]

Error ---------------------------------------------------------------- node_modules/graphql/language/index.js.flow:16:23

Importing from an untyped module makes it `any` and is not safe! Did you mean to add `// @flow` to the top of
`./printer`? (`untyped-import`)

16| export { print } from './printer';
^^^^^^^^^^^

Error ---------------------------------------------------------------- node_modules/graphql/language/lexer.js.flow:52:38

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

52| token = token.next || ((token: any).next = readToken(this, token));
^^^

Error --------------------------------------------------------------- node_modules/graphql/language/lexer.js.flow:136:10

Sketchy null check on string [1] which is potentially an empty string. Perhaps you meant to check for null or
undefined [2]? (`sketchy-null-string`)

node_modules/graphql/language/lexer.js.flow:136:10
136| return value ? `${token.kind} "${value}"` : token.kind;
^^^^^

References:
node_modules/graphql/language/ast.js.flow:77:11
77| +value: string | void,
^^^^^^ [1]
node_modules/graphql/language/ast.js.flow:77:20
77| +value: string | void,
^^^^ [2]

Error -------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:185:27

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

185| value: ((token.value: any): string),
^^^

Error --------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:505:7

Sketchy null check on boolean [1] which is potentially false. Perhaps you meant to check for null or undefined [1]?
(`sketchy-null-bool`)

node_modules/graphql/language/parser.js.flow:505:7
505| if (lexer.options.experimentalFragmentVariables) {
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

References:
node_modules/graphql/language/parser.js.flow:115:35
115| experimentalFragmentVariables?: boolean,
^^^^^^^ [1]

Error -------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:567:31

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

567| value: ((token.value: any): string),
^^^

Error -------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:574:31

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

574| value: ((token.value: any): string),
^^^

Error -------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:598:31

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

598| value: ((token.value: any): string),
^^^

Error -------------------------------------------------------------- node_modules/graphql/language/parser.js.flow:615:27

Unclear type. Using `any`, `Object`, or `Function` types is not safe! (`unclear-type`)

615| value: ((token.value: any): string),
^^^

... 122 more errors (only 50 out of 172 errors displayed)
```