feat: expand browser support to widely available Baseline

This commit updates the `browserslist` configuration to use browsers generated by Baseline. The exact list is pulled from angular/angular-cli#30036.

Ideally this should be generated at build time from a raw date string like the Angular CLI repo does, however this would duplicate the tooling and isn't strictly necessary anyways as the release process already requires extracting the generated browser versions purely for documentation. Also copying that configuration to `ng-packagr` is not significantly more toil.

Author: dgp1130

.browserslistrc

@@ -0,0 +1,8 @@
+# From "widely available" Baseline for 2025-03-31.
+Chrome >= 107
+ChromeAndroid >= 107
+Edge >= 107
+Firefox >= 104
+FirefoxAndroid >= 104
+Safari >= 16
+iOS >= 16

scripts/postbuild.js

@@ -2,6 +2,7 @@ const { readFileSync, copyFileSync, writeFileSync, constants, mkdirSync } = requ
 
 copyFileSync('LICENSE', 'dist/LICENSE', constants.COPYFILE_FICLONE);
 copyFileSync('README.md', 'dist/README.md', constants.COPYFILE_FICLONE);
+copyFileSync('.browserslistrc', 'dist/.browserslistrc', constants.COPYFILE_FICLONE);
 copyFileSync('src/ng-package.schema.json', 'dist/ng-package.schema.json', constants.COPYFILE_FICLONE);
 copyFileSync('src/ng-entrypoint.schema.json', 'dist/ng-entrypoint.schema.json', constants.COPYFILE_FICLONE);
 

src/lib/styles/stylesheet-processor.ts

@@ -21,15 +21,10 @@ export class StylesheetProcessor extends ComponentStylesheetBundler {
     // By default, browserslist defaults are too inclusive
     // https://github.com/browserslist/browserslist/blob/83764ea81ffaa39111c204b02c371afa44a4ff07/index.js#L516-L522
     // We change the default query to browsers that Angular support.
-    // https://angular.io/guide/browser-support
-    (browserslist.defaults as string[]) = [
-      'last 2 Chrome versions',
-      'last 1 Firefox version',
-      'last 2 Edge major versions',
-      'last 2 Safari major versions',
-      'last 2 iOS major versions',
-      'Firefox ESR',
-    ];
+    // https://angular.dev/reference/versions#browser-support
+    (browserslist.defaults as string[]) = browserslist(undefined, {
+      path: require.resolve('../../../.browserslistrc'),
+    });
 
     const browserslistData = browserslist(undefined, { path: basePath });
     const searchDirs = generateSearchDirectories([projectBasePath]);