Fix directive check in no-empty-file
for TypeScript parser
#2180
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Fixes #2175
To ensure the fix is valid, I
updated the @typescript-eslint/parser dev dependency andadded a few simpletest.typescript
cases tono-empty-file
tests. I attempted to update@typescript-eslint/parser
to v6, but it caused the angular integration test to fail, so I reverted that change. Given that this is still being tested on the v5 parser, the tests I added don't actually do much yet, but will provide checks once the parser is upgraded.Please let me know if there's any additional testing I can / should add to this PR!