Add action

.eslintrc.json

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+{
+    "env": {
+        "commonjs": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parserOptions": {
+        "ecmaVersion": 2018
+    },
+    "rules": {
+    }
+}

.gitignore

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+node_modules

action.yml

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+name: 'Create or Update Comment'
+description: 'Create or update an issue or pull request comment'
+inputs:
+  token:
+    description: 'A GitHub access token.'
+    required: true
+  repository:
+    description: 'The full name of the repository to create or update a comment.'
+  issue-number:
+    description: 'The number of the issue in which to create a comment.'
+  comment-id:
+    description: 'The id of the comment to update.'
+  body:
+    description: 'The comment body.'
+  edit-mode:
+    description: 'The mode when updating a comment, "replace" or "append".'
+  reaction-type:
+    description: 'The reaction to add to the comment.'
+runs:
+  using: 'node12'
+  main: 'dist/index.js'
+branding:
+  icon: 'message-square'  
+  color: 'gray-dark'