add CI

.github/workflows/rust.yaml

@@ -0,0 +1,59 @@
+on: push
+name: Rust CI
+jobs:
+  check:
+    name: check
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout sources
+        uses: actions/checkout@v2
+      - name: install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - name: check for errors
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --locked
+        env:
+          RUST_BACKTRACE: 1
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout sources
+        uses: actions/checkout@v2
+      - name: install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - name: run tests
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --locked
+        env:
+          RUST_BACKTRACE: 1
+  clippy:
+    name: clippy
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout sources
+        uses: actions/checkout@v2
+      - name: install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          components: clippy
+          override: true
+      - name: run linter
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- -D warnings