`Unable to find field "__type" on type "Query"` with presets `import-types` and `near-operation-file`

**Describe the bug**

When I have a query against `Query.__type()` in combination with `import-types` or `near-operation`, graphql-codegen fails:

```
yarn run v1.22.0
$ yarn gql:download && yarn gql:generate
$ get-graphql-schema http://127.0.0.1:8000 > src/graphql/schema.graphql
$ yarn gql:codegen
$ graphql-codegen --config codegen.yml
✔ Parse configuration
❯ Generate outputs
✔ Generate src/graphql/graphql-types.tsx
❯ Generate to src/graphql/graphql-operations.tsx (using EXPERIMENTAL preset "
import-types")
✔ Load GraphQL schemas
✔ Load GraphQL documents
✖ Generate
→ Unable to find field "__type" on type "Query"!
✔ Generate src/graphql/fragment-introspection.ts

Found 1 error

✖ src/graphql/graphql-operations.tsx
Error: Unable to find field "__type" on type "Query"!
at nextTypeName (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:141:39)
at Object.enter (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:160:23)
at Object.visit (/base/node_modules/graphql/language/visitor.js:242:26)
at Object.isUsingTypes (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:121:13)
at options.documents.map.documentFile (/base/node_modules/@graphql-codegen/import-types-preset/index.cjs.js:30:31)
at Array.map ()
at Object.buildGeneratesSection (/base/node_modules/@graphql-codegen/import-types-preset/index.cjs.js:29:27)
at Listr.task.wrapTask (/base/node_modules/@graphql-codegen/cli/bin.js:799:64)
at process._tickCallback (internal/process/next_tick.js:68:7)
Error: Unable to find field "__type" on type "Query"!
at nextTypeName (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:141:39)
at Object.enter (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:160:23)
at Object.visit (/base/node_modules/graphql/language/visitor.js:242:26)
at Object.isUsingTypes (/base/node_modules/@graphql-codegen/plugin-helpers/index.cjs.js:121:13)
at options.documents.map.documentFile (/base/node_modules/@graphql-codegen/import-types-preset/index.cjs.js:30:31)
at Array.map ()
at Object.buildGeneratesSection (/base/node_modules/@graphql-codegen/import-types-preset/index.cjs.js:29:27)
at Listr.task.wrapTask (/base/node_modules/@graphql-codegen/cli/bin.js:799:64)
at process._tickCallback (internal/process/next_tick.js:68:7)

Something went wrong
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
[1] 12898 exit 1 yarn gql

```

**To Reproduce**

When I dump everything into one target file with plugins
```
- typescript
- typescript-operations
- typescript-react-apollo
```
I get no error, but once I split it up into multiple files & change the preset to either `import-types` or `near-operation-file`, I get the error message
> Unable to find field "__type" on type "Query"

True, that field is not explicitly part of my `Query` type in the schema, but it should be there implicitly for every schema.

It seems that these implicit fields are not available from the presets?

Steps to reproduce the behavior:

Use a query like
```ts
export const GetFilterInfo = gql`
query FilterInfo($filterName: String!) {
__type(name: $filterName) {
kind
name
description
inputFields {
name
type {
kind
name
}
}
}
}
`;
```

with the presets `import-types` or `near-operation-file`.

**Expected behavior**

No error message, files get generated.

**Environment:**

- OS: Linux
- `@graphql-codegen/^1.13.2`:
- NodeJS: 10.17.0