Alan Agius e34bfe5eb1 fix(@angular-devkit/build-angular): ignore specs in node_modules when finding specs
Some libraries ship spec in node_modules which might result errors such

```
./node_modules/comment-parser/tests/unit/spacer-description-joiner.spec.ts - Error: Module build failed (from ./node_modules/@ngtools/webpack/src/ivy/index.js):
Error: /Users/kkostadinov/Projects/material.angular.io/node_modules/comment-parser/tests/unit/spacer-description-joiner.spec.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.
```
2022-10-12 16:06:19 +02:00
..