Try gh workflows too

.github/workflows/rust.yml

@@ -0,0 +1,29 @@
+name: Rust
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Cache cargo build dir
+      uses: actions/cache@v2
+      with:
+        path: target
+        key: ${{ runner.os }}-target
+    - name: Build
+      run: cargo build
+    - name: Run tests
+      run: cargo test
+    - name: Run benches
+      run: cargo bench