Add GitHub Actions flow to assist with manual deploys

.github/workflows/manual-deploy.yml

@@ -0,0 +1,30 @@
+name: Manual Deploy
+on:
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout wolifecycle-maven-plugin source code
+        uses: actions/checkout@v2
+
+      - name: Cache local Maven repository
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Deploy snapshots with Maven
+        run: mvn -B deploy --file pom.xml -s .maven-settings.xml -DretryFailedDeploymentCount=10
+        env:
+          CI_DEPLOY_USERNAME: ${{ secrets.CI_DEPLOY_USERNAME }}
+          CI_DEPLOY_PASSWORD: ${{ secrets.CI_DEPLOY_PASSWORD }}