build: Add CI setup

.github/workflows/ci.yml

@@ -0,0 +1,58 @@
+name: ci
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-18.04
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Unshallow
+        run: git fetch --prune --unshallow
+      -
+        name: Set up Go
+        uses: actions/setup-go@v1
+        with: # Ideally this should be picked up from .go-version rather than hard-coded
+          go-version: 1.14.1
+      -
+        name: Snapshot build (cross-platform)
+        uses: goreleaser/goreleaser-action@v1
+        with:
+          version: latest
+          args: build --snapshot --skip-post-hooks
+
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-18.04
+          - windows-2019
+          - macos-10.15
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      -
+        name: Unshallow
+        run: git fetch --prune --unshallow
+      -
+        name: Set up Go
+        uses: actions/setup-go@v1
+        with: # Ideally this should be picked up from .go-version rather than hard-coded
+          go-version: 1.14.1
+      -
+        name: Go mod verify
+        run: go mod verify
+      -
+        name: Run tests
+        run: make test