chore(package): update @typescript-eslint/eslint-plugin to version 2.7.0

Closes #37

Author: greenkeeper[bot]

package.json

@@ -59,7 +59,7 @@
     "@commitlint/config-conventional": "^7.1.2",
     "@types/jest": "^24.0.4",
     "@types/node": "^11.9.3",
-    "@typescript-eslint/eslint-plugin": "^1.2.0",
+    "@typescript-eslint/eslint-plugin": "^2.7.0",
     "@typescript-eslint/parser": "^1.2.0",
     "codecov": "^3.1.0",
     "eslint": "^5.9.0",