fix: upgrade @typescript-eslint/parser from 2.27.0 to 2.28.0 (#54)

Snyk has created this PR to upgrade @typescript-eslint/parser from 2.27.0 to 2.28.0.

See this package in NPM:
https://www.npmjs.com/package/@typescript-eslint/parser

See this project in Snyk:
https://app.snyk.io/org/freaktechnik/project/9d7e55df-a6bc-453c-9e81-1c3dd78fd733?utm_source=github&utm_medium=upgrade-pr

Co-authored-by: Martin Giger <[email protected]>

Author: snyk-bot

Diff for: package-lock.json

@@ -16,7 +16,7 @@
     "@ava/babel": "^1.0.1",
     "@freaktechnik/eslint-config-node": "^7.1.0",
     "@freaktechnik/eslint-config-test": "^7.1.0",
-    "@typescript-eslint/parser": "^2.27.0",
+    "@typescript-eslint/parser": "^2.28.0",
     "ava": "^3.7.1",
     "codecov": "^3.6.5",
     "eclint": "^2.8.1",