feat: add workflow to allow for automatic opening of PR upon release

.github/workflows/release.yml

@@ -0,0 +1,26 @@
+name: Create Release Pull Request
+on:
+    workflow_dispatch:
+        inputs:
+            version:
+              description: "Version"
+              required: true
+    pull_request:
+
+jobs:
+  create-pull-request:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+
+      - name: Get date
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y%m%d')"
+
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v6
+        with:
+          branch: release-v${{inputs.version}}-${{steps.date.outputs.date}}
+          token: ${{ secrets.GITHUB_TOKEN }}
+          title: 'Release v${{inputs.version}}'