update github actions

.github/workflows/rust.yml

@@ -1,15 +1,76 @@
-name: Rust
+name: CI
 
-on: [push]
+on:
+  pull_request:
+  push:
+
+env:
+  RUSTFLAGS: -Dwarnings
 
 jobs:
-  build:
-
-    runs-on: ubuntu-latest
+  build_and_test:
+    name: Build and test
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        rust: [nightly, beta, stable]
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
+    - uses: actions/checkout@master
+
+    - name: Install ${{ matrix.rust }}
+      uses: actions-rs/toolchain@v1
+      with:
+        toolchain: ${{ matrix.rust }}
+        override: true
+
+    - name: check
+      uses: actions-rs/cargo@v1
+      with:
+        command:  check
+        args: --all --bins --examples --tests
+
+    - name: check bench
+      uses: actions-rs/cargo@v1
+      if: matrix.rust == 'nightly'
+      with:
+        command:  check
+        args: --benches
+
+    - name: tests
+      uses: actions-rs/cargo@v1
+      with:
+        command: test
+        args: --all
+
+  check_fmt_and_docs:
+    name: Checking fmt and docs
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+
+    - uses: actions-rs/toolchain@v1
+      with:
+          profile: minimal
+          toolchain: nightly
+          override: true
+          components: rustfmt
+
+    - name: fmt
+      run: cargo fmt --all -- --check
+
+    - name: Docs
+      run: cargo doc
+
+  clippy_check:
+    name: Clippy check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Install rust
+        run: rustup update beta && rustup default beta
+      - name: Install clippy
+        run: rustup component add clippy
+      - name: clippy
+        run: cargo clippy --all