Use testpack to test npm publish

Author: wimpyprogrammer

.editorconfig

@@ -9,6 +9,10 @@ end_of_line = lf
 insert_final_newline = true
 indent_style = tab
 
+[*.yml]
+indent_style = space
+indent_size = 2
+
 [package.json]
 indent_style = space
 indent_size = 2

.github/workflows/tests.yml

@@ -35,6 +35,7 @@ jobs:
       - run: npm run lint
       - run: npm run build
       - run: npm run test
+      - run: npx testpack-cli
 
       - name: Upload test coverage report to Codecov
         uses: codecov/codecov-action@v1