fix: www/build_common/package.json & www/build_common/yarn.lock to re…

…duce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818

www/build_common/package.json

@@ -18,7 +18,7 @@
         "jasmine-core": "^3.4.0",
         "karma": "^4.1.0",
         "karma-chrome-launcher": "^2.2.0",
-        "karma-coverage": "^1.1.2",
+        "karma-coverage": "^2.0.2",
         "karma-jasmine": "^2.0.1",
         "karma-sourcemap-loader": "^0.3.7",
         "karma-spec-reporter": "^0.0.32",
@@ -32,7 +32,7 @@
         "pug": "^3.0.1",
         "raw-loader": "^2.0.0",
         "style-loader": "^0.23.1",
-        "webpack": "^4.30.0",
+        "webpack": "^5.1.1",
         "webpack-cli": "^3.3.1",
         "webpack-dev-server": "^3.3.1",
         "webpack-fix-style-only-entries": "^0.2.1",