Separate out GitHub Actions

.github/workflows/long_running_test.yml

@@ -0,0 +1,23 @@
+name: Long-Running Unit Test
+on: pull_request
+
+jobs:
+  test:
+    name: Run Long Running Unit Test
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v2
+        with: 
+          go-version: '1.17'
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ inputs.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: ${{ inputs.os }}-go-
+
+      - run: go install ./cmd/litestream
+
+      - run: go test -v -run=TestCmd_Replicate_LongRunning ./integration -long-running-duration 1m