Add lib to CompatHelper.yml

Author: ChrisRackauckas

.github/workflows/CompatHelper.yml

@@ -23,4 +23,4 @@ jobs:
       - name: CompatHelper.main()
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: julia -e 'using CompatHelper; CompatHelper.main(;subdirs=["", "docs", "test/downstream"])'
+        run: julia -e 'using CompatHelper; CompatHelper.main(;subdirs=["", "docs", "test/downstream", "lib"])'