Add GitHub actions configuration

.github/workflows/build.yml

@@ -0,0 +1,28 @@
+name: Rust
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix: 
+        os: [ubuntu-latest, osx-latest, windows-latest ]
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: true
+    - name: Build
+      run: cargo build --verbose
+    - name: Run tests
+      run: cargo test --verbose