Update to use the Monaco editor (#7)

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
+    "@monaco-editor/react": "^4.3.1",
     "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^11.1.0",
     "@testing-library/user-event": "^12.1.10",
@@ -11,11 +12,9 @@
     "history": "^5.0.0",
     "local-storage": "^2.0.0",
     "pako": "^2.0.3",
-    "prismjs": "^1.23.0",
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
-    "react-scripts": "4.0.3",
-    "react-simple-code-editor": "^0.11.0",
+    "react-scripts": "5.0.0",
     "styled-components": "^5.2.1"
   },
   "scripts": {