add authors and changelog files and reminder in CI

.github/workflows/rebase.yml

@@ -0,0 +1,15 @@
+on: pull_request_target
+name: Changelog Reminder
+jobs:
+  remind:
+    name: Changelog Reminder
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Changelog Reminder
+      uses: peterjgrainger/action-changelog-reminder@v1.2.0
+      with:
+        changelog_regex: 'CHANGELOG.md'
+        customPrMessage: 'You are welcome to add an entry to the CHANGELOG.md as well'
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}