Upgrade Typescript + @typescript-eslint packages

Author: cdimitroulas

package-lock.json

@@ -25,8 +25,8 @@
   "license": "ISC",
   "dependencies": {
     "@types/mocha": "^5.2.7",
-    "@typescript-eslint/eslint-plugin": "^2.21.0",
-    "@typescript-eslint/parser": "^2.21.0",
+    "@typescript-eslint/eslint-plugin": "^3.0.2",
+    "@typescript-eslint/parser": "^3.0.2",
     "cross-spawn": "^6.0.5",
     "eslint": "^6.2.2",
     "eslint-config-prettier": "^6.1.0",
@@ -35,7 +35,7 @@
     "prettier": "1.18.2",
     "pretty-quick": "^1.11.1",
     "ts-node": "^8.6.2",
-    "typescript": "^3.8.3",
+    "typescript": "^3.9.3",
     "yargs-parser": "^13.1.1"
   },
   "devDependencies": {