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

action.yml

@@ -2,9 +2,13 @@ name: 'npm audit action'
 description: 'run npm audit'
 author: 'Naoki Oketani <okepy.naoki@gmail.com>'
 inputs:
-  myInput:              # change this
-    description: 'input description here'
-    default: 'default value if applicable'
+  token:
+    description: 'GitHub access token used to create an issue'
+    required: true
+  issue_title:
+    description: 'Issue title'
+    default: 'npm audit found vulnerabilities'
+    required: false
 runs:
   using: 'node12'
   main: 'dist/index.js'