[misc] upgrade build scripts to version 3.11.0 and cleanup packages

```
npm uninstall prettier-eslint-cli eslint-plugin-standard eslint-plugin-jsx-a11y eslint-plugin-react eslint-config-standard-jsx eslint-config-standard-react babel-eslint
npm dedupe
```

services/real-time/.eslintrc

@@ -3,9 +3,9 @@
 // https://github.com/sharelatex/sharelatex-dev-environment
 {
   "extends": [
+    "eslint:recommended",
     "standard",
     "prettier",
-    "prettier/standard"
   ],
   "parserOptions": {
     "ecmaVersion": 2018

services/real-time/.github/dependabot.yml

@@ -20,4 +20,4 @@ updates:
     # future if we reorganise teams
     labels:
       - "dependencies"
-      - "Team-Magma"
+      - "type:maintenance"

services/real-time/.prettierrc

@@ -2,6 +2,10 @@
 # Instead run bin/update_build_scripts from
 # https://github.com/sharelatex/sharelatex-dev-environment
 {
+  "arrowParens": "avoid",
   "semi": false,
-  "singleQuote": true
+  "singleQuote": true,
+  "trailingComma": "es5",
+  "tabWidth": 2,
+  "useTabs": false
 }

services/real-time/buildscript.txt

@@ -5,4 +5,4 @@ real-time
 --env-pass-through=
 --node-version=12.21.0
 --public-repo=True
---script-version=3.8.0
+--script-version=3.11.0

services/real-time/package.json

@@ -16,9 +16,10 @@
     "test:unit:_run": "mocha --recursive --reporter spec $@ test/unit/js",
     "test:unit": "npm run test:unit:_run -- --grep=$MOCHA_GREP",
     "nodemon": "nodemon --config nodemon.json",
-    "lint": "node_modules/.bin/eslint --max-warnings 0 .",
-    "format": "node_modules/.bin/prettier-eslint $PWD'/**/*.js' --list-different",
-    "format:fix": "node_modules/.bin/prettier-eslint $PWD'/**/*.js' --write"
+    "lint": "eslint --max-warnings 0 --format unix .",
+    "format": "prettier --list-different $PWD/'**/*.js'",
+    "format:fix": "prettier --write $PWD/'**/*.js'",
+    "lint:fix": "eslint --fix ."
   },
   "dependencies": {
     "@overleaf/metrics": "^3.5.1",
@@ -41,22 +42,21 @@
     "underscore": "1.13.1"
   },
   "devDependencies": {
-    "chai": "~1.9.1",
+    "chai": "^4.2.0",
+    "chai-as-promised": "^7.1.1",
     "cookie-signature": "^1.1.0",
-    "eslint": "^6.8.0",
-    "eslint-config-prettier": "^6.10.0",
-    "eslint-config-standard": "^14.1.0",
-    "eslint-plugin-chai-expect": "^2.1.0",
-    "eslint-plugin-chai-friendly": "^0.5.0",
-    "eslint-plugin-import": "^2.20.1",
-    "eslint-plugin-mocha": "^6.3.0",
-    "eslint-plugin-node": "^11.0.0",
+    "eslint": "^7.21.0",
+    "eslint-config-prettier": "^8.1.0",
+    "eslint-config-standard": "^16.0.2",
+    "eslint-plugin-chai-expect": "^2.2.0",
+    "eslint-plugin-chai-friendly": "^0.6.0",
+    "eslint-plugin-import": "^2.22.1",
+    "eslint-plugin-mocha": "^8.0.0",
+    "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-prettier": "^3.1.2",
     "eslint-plugin-promise": "^4.2.1",
-    "eslint-plugin-standard": "^4.0.1",
     "mocha": "^8.3.2",
-    "prettier": "^2.0.0",
-    "prettier-eslint-cli": "^5.0.0",
+    "prettier": "^2.2.1",
     "sandboxed-module": "~0.3.0",
     "sinon": "^9.2.4",
     "timekeeper": "0.0.4",