[Bug]: eslint checking output files when there are zero sources

[alexeagle]

What happened?

In #331 I changed eslint and dropped the logic that checked for zero files.
https://github.com/aspect-build/rules_lint/pull/331/files#diff-6c41bd6f23bdcf48b0a646963feda9493b9cff7e4bc6c6c8dac48aecbf1136b7L190

When you use ts_project(transpiler) you get a js_library target with no sources, just re-exports. When you lint this target we now run eslint with no specific files, so it lints everything it can find.

Version

v1.0.0-rc6 through v1.0.0-rc8

How to reproduce

Adding a test for this in the fix

Any other information?

No response