Migrate from Travis CI to Github Workflows (#143)

.github/workflows/rust.yml

@@ -0,0 +1,27 @@
+name: Rust
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install latest stable rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+          components: rustfmt, clippy
+      - name: Build
+        run: cargo build --verbose
+      - name: Run tests
+        run: cargo test --verbose
+#    - name: Clippy
+#      run: cargo clippy --all-targets --all-features -- -D warnings -A clippy::unreadable_literal -A clippy::needless_range_loop -A clippy::float_cmp -A clippy::comparison-chain -A clippy::needless-doctest-main -A clippy::missing-safety-doc
+      - name: Format check
+        run: cargo fmt --all -- --check