Add GitHub workflow to build and test every PR

.github/workflows/rust.yml

@@ -0,0 +1,27 @@
+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: Install libsdl
+      run: sudo apt-get update && sudo apt-get -y install libsdl2-dev
+    - name: Check
+      run: cargo check --workspace --verbose --all-targets --all-features
+    - name: Build
+      run: cargo build --workspace --verbose --all-targets
+    - name: Run tests
+      run: cargo test --workspace --verbose --all-targets
+