ignore .npmrc on diff

Author: legobeat

.github/workflows/build-test.yml

@@ -80,7 +80,7 @@ jobs:
       - name: Require clean working directory
         shell: bash
         run: |
-          if ! git diff --exit-code; then
+          if ! git diff --exit-code -- . ':!.npmrc'; then
             echo "Working tree dirty at end of job"
             exit 1
           fi