Bump @typescript/eslint-plugin, add package-lock.json and yarn.lock to .gitignore

.gitignore

@@ -14,6 +14,8 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 lerna-debug.log*
+/package-lock.json
+/yarn.lock
 
 # Diagnostic reports (https://nodejs.org/api/report.html)
 report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json

package.json

@@ -142,7 +142,7 @@
     "@types/socket.io-client": "^1.4.33",
     "@types/winston": "^2.4.4",
     "@types/yargs": "^15.0.5",
-    "@typescript-eslint/eslint-plugin": "^2.5.0",
+    "@typescript-eslint/eslint-plugin": "^4.26",
     "@typescript-eslint/parser": "^4.3.0",
     "all-contributors-cli": "^6.17.2",
     "chai": "^4.2.0",