fix: add unit tests, expand regex

Author: bahmutov

.github/workflows/ci.yml

@@ -10,6 +10,9 @@ jobs:
       - name: Install NPM dependencies 📦
         uses: bahmutov/npm-install@v1
 
+      - name: Unit tests 🧪
+        run: npm test
+
       - name: Check all covered files 📊
         run: |
           node bin/check-coverage main1.js