Add Ansible Galaxy release workflow

Fixes #75

.github/workflows/release-galaxy.yml

@@ -0,0 +1,34 @@
+---
+name: Ansible Galaxy
+on:
+  push:
+    branches:
+      - main
+      - master
+  release:
+    types:
+      - published
+
+jobs:
+  galaxy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements*.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt -r requirements-dev.txt
+      - name: Trigger a new import on Galaxy.
+        run: ansible-galaxy role import --api-key ${{ secrets.GALAXY_API_KEY }} $(echo ${{ github.repository }} | cut -d/ -f1) $(echo ${{ github.repository }} | cut -d/ -f2)