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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-CODEMIRROR-10494092

Author: snyk-bot

package-lock.json

@@ -98,7 +98,7 @@
         "@uiw/file-icons": "^1.3.2",
         "bootstrap": "^5.1.3",
         "browser-mime": "^1.0.1",
-        "codemirror": "^5.65.16",
+        "codemirror": "^6.0.0",
         "cross-env": "^7.0.3",
         "devicon": "^2.15.1",
         "emmet": "^2.4.11",