fix: upgrade @typescript-eslint/eslint-plugin from 2.20.0 to 2.22.0 (#8)

Author: snyk-bot

package-lock.json

@@ -21,7 +21,7 @@
   "author": "Nordic Semiconductor ASA | nordicsemi.no",
   "license": "BSD-3-Clause",
   "dependencies": {
-    "@typescript-eslint/eslint-plugin": "^2.20.0",
+    "@typescript-eslint/eslint-plugin": "^2.22.0",
     "@typescript-eslint/parser": "^2.22.0",
     "eslint-config-prettier": "^6.10.0"
   },