More robust CI

Since CI usage is free for public repos, why not go all out for test validation!

.github/workflows/rust.yml

@@ -1,22 +1,50 @@
-name: Rust
+name: CI
 
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
+on: [push, pull_request, workflow_dispatch]
 
 env:
   CARGO_TERM_COLOR: always
 
 jobs:
   build:
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+        toolchain: [stable, nightly, "1.71.1"]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
 
-    runs-on: ubuntu-latest
+      - uses: actions-rs/toolchain@v1
+        id: toolchain
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          profile: minimal
+          components: rustfmt, clippy
+          override: true
 
-    steps:
-    - uses: actions/checkout@v4
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
+      - name: Install alsa and udev
+        run: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev
+        if: runner.os == 'linux'
+
+      - name: Setup cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-test-rustc-${{ steps.toolchain.outputs.rustc_hash }}-${{ hashFiles('**/Cargo.lock') }}
+
+      - uses: actions-rs/cargo@v1
+        if: runner.os == 'linux'
+        with:
+          command: fmt
+          args: --all -- --check
+
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+        env:
+          CARGO_INCREMENTAL: 0
+          RUSTFLAGS: "-C debuginfo=0"