added changelog

Author: veds12

.github/workflows/changelog_update.yml

@@ -0,0 +1,35 @@
+name: Generate Changelog
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  generate_changelog:
+    name: Update Changelog
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout master
+        uses: actions/checkout@v2
+
+      - name: Generate changelog
+        uses: charmixer/[email protected]
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Commit files
+        env: 
+          CI_USER: ${{ secrets.YOUR_GITHUB_USER }}
+          CI_EMAIL: ${{ secrets.YOUR_GITHUB_EMAIL }}
+          ACTIONS_ALLOW_UNSECURW_COMMANDS: true
+        run: |
+          git config --local user.email "<USER_EMAIL>"
+          git config --local user.name "<USER_USERNAME>"
+          git add docs/CHANGELOG.md && git commit -m 'Updated CHANGELOG.md' && echo ::set-env name=push::1 || echo "No changes to CHANGELOG.md"
+      - name: Push changes
+        if: env.push == 1
+        env: 
+          CI_USER: ${{ secrets.YOUR_GITHUB_USER }}
+          CI_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          git push "https://$CI_USER:[email protected]/$GITHUB_REPOSITORY.git" HEAD:master