Open a GitHub Issue if vulnerabilities are found (#8)

* Get GitHub access token from input

* install npm package

* fix TypeScript error to successfully build

ref: https://github.com/actions/toolkit/issues/199

* npm i strip-ansi to remove control characters

* create an issue

* use template literal to pass lint

* npm run format; npm run lint

* use inputs.issue_title as issue title

* document inputs.issue_title

* add inputs.issue_title

package.json

@@ -26,7 +26,10 @@
   "author": "Naoki Oketani <okepy.naoki@gmail.com>",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.2.0"
+    "@actions/core": "^1.2.0",
+    "@actions/github": "^1.1.0",
+    "@octokit/rest": "^16.35.0",
+    "strip-ansi": "^6.0.0"
   },
   "devDependencies": {
     "@types/jest": "^24.0.23",