fix: package.json & yarn.lock to reduce vulnerabilities

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

package.json

@@ -7,15 +7,15 @@
     "copy-to-clipboard": "^3.0.8",
     "es6-promise": "^4.2.8",
     "expose-loader": "^0.7.5",
-    "glob": "^7.1.6",
+    "glob": "^9.0.0",
     "glob-all": "^3.2.1",
     "howler": "2.1.3",
     "is-svg": "4.3.0",
     "jquery": "^3.5.1",
     "lodash": "^4.17.21",
     "minimist": "1.2.3",
     "popper.js": "1.14.7",
-    "purgecss-webpack-plugin": "^4.0.3",
+    "purgecss-webpack-plugin": "^6.0.0",
     "rails-erb-loader": "^5.5.2",
     "resolve-url-loader": "^4.0.0",
     "sass": "^1.25.0",