Support for Angular 9

Note, this is based on the popup branch. (commit 91bc153b88).

In an Angular 9 set up the following steps are needed for the library to work:

1. Add this snippet to the root package.json (reference):

"browser": {
    "fs": false,
    "path": false,
    "os": false,
    "crypto": false,
    "stream": false,
    "http": false,
    "tls": false,
    "zlib": false,
    "https": false,
    "net": false
 }

2. Update the builder code to use node's crypto (reference). In file node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js replace node: false with node: {crypto: true, stream: true, fs: 'empty', net: 'empty'}. This can be hooked to postinstall script.

3. Set allowSyntheticDefaultImports in the project tsconfig.
   ERROR in node_modules/solid-auth-fetcher/dist/login/ILoginOptions.d.ts:1:8 - error TS1259: Module '"node_modules/solid-auth-fetcher/node_modules/@types/url-parse/index"' can only be default-imported using the 'allowSyntheticDefaultImports' flag

Start by checking the popup branch at commit 91bc153b88, then inspect the root package.json, Angular's browser.js builder configuration, and the project tsconfig. Reproduce the Angular 9 setup and verify whether the browser fallbacks, crypto and stream handling, and allowSyntheticDefaultImports requirement can be supported by the library rather than manual node_modules edits.