Update node dependencies + fix breaking changes

-All node dependencies are up-to-date in package.json
-Updated semantic versioning of some node dependencies in package.json
-Applied fixes to necessary explorer files to fix breaking changes to mongoose dependency
-Update README with new Node.js and MongoDB version recommendations

NOTE: Node.js must be updated to at least v14.13.1 to fix breaking errors in a few of the updated dependencies

package.json

@@ -25,26 +25,26 @@
   },
   "dependencies": {
     "express": ">=4.17.1",
-    "async": "^3.1.0",
+    "async": "^3.2.2",
     "intl": "^1.2.5",
     "serve-favicon": "^2.5.0",
-    "morgan": ">=1.9.1",
-    "cookie-parser": "~1.4.4",
-    "body-parser": "~1.19.0",
-    "debug": ">=4.1.1",
-    "pug": "~3.0.0",
-    "postman-request": "2.88.1-postman.27",
-    "jsonminify": "0.4.1",
+    "morgan": ">=1.10.0",
+    "cookie-parser": "^1.4.6",
+    "body-parser": "^1.19.0",
+    "debug": ">=4.3.3",
+    "pug": "~3.0.2",
+    "postman-request": "^2.88.1-postman.30",
+    "jsonminify": "^0.4.1",
     "jstransformer-markdown-it": "^2.1.0",
-    "mongodb": "3.6.3",
-    "mongoose": "5.11.4",
-    "qr-image": "~3.2.0",
-    "sass": "1.30.0",
-    "json": "10.0.0",
-    "strip-json-comments-cli": "1.0.1",
-    "bad-words": "3.0.4"
+    "mongodb": "^4.2.1",
+    "mongoose": "^6.0.14",
+    "qr-image": "^3.2.0",
+    "sass": "^1.44.0",
+    "json": "^11.0.0",
+    "strip-json-comments-cli": "^2.0.1",
+    "bad-words": "^3.0.4"
   },
   "devDependencies": {
-    "jasmine": "~3.6.3"
+    "jasmine": ">=3.6.3"
   }
 }