feat(assignees): add 6 new options to avoid stale for assignees (#327)

* feat(assignees): add new option to avoid stale for assignees

closes #271

* test: add more coverage

* docs: fix readme format issue

* docs: reorder and enhance typo

* docs(contributing): add more information about the npm scripts

action.yml

@@ -120,6 +120,30 @@ inputs:
     description: 'The date used to skip the stale action on issue/pull request created before it (ISO 8601 or RFC 2822).'
     default: ''
     required: false
+  exempt-assignees:
+    description: 'The assignees which exempt an issue or a pull request from being marked as stale. Separate multiple assignees with commas (eg. "user1,user2")'
+    default: ''
+    required: false
+  exempt-issue-assignees:
+    description: 'The assignees which exempt an issue from being marked as stale. Separate multiple assignees with commas (eg. "user1,user2"). Override "exempt-assignees" option regarding only the issues.'
+    default: ''
+    required: false
+  exempt-pr-assignees:
+    description: 'The assignees which exempt a pull request from being marked as stale. Separate multiple assignees with commas (eg. "user1,user2"). Override "exempt-assignees" option regarding only the pull requests.'
+    default: ''
+    required: false
+  exempt-all-assignees:
+    description: 'Exempt all issues and pull requests with assignees from being marked as stale. Default to false.'
+    default: 'false'
+    required: false
+  exempt-all-issue-assignees:
+    description: 'Exempt all issues with assignees from being marked as stale. Override "exempt-all-assignees" option regarding only the issues.'
+    default: ''
+    required: false
+  exempt-all-pr-assignees:
+    description: 'Exempt all pull requests with assignees from being marked as stale. Override "exempt-all-assignees" option regarding only the pull requests.'
+    default: ''
+    required: false
 runs:
   using: 'node12'
   main: 'dist/index.js'