Added Github Action that updates code in master branch.

.github/workflows/master_updater.yml

@@ -0,0 +1,27 @@
+name: Master branch updater.
+
+on:
+  release:
+    types: released
+
+jobs:
+  updater:
+    runs-on: ubuntu-latest
+    env:
+      SKIP: "0"
+      to_branch: "master"
+    steps:
+      - uses: actions/checkout@v1
+      - name: Push the code to the master branch.
+        run: |
+          url=https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
+          latest_tag=$(git describe --tags --abbrev=0)
+          echo "Latest tag: $latest_tag"
+
+          git remote set-url origin $url
+          git remote -v
+          git checkout master
+          git merge $latest_tag
+
+          git push origin HEAD:refs/heads/$to_branch
+          echo "Done!"