Add CI

.github/workflows/ci.yml

@@ -0,0 +1,32 @@
+name: CI
+
+on:
+  - push
+  - pull_request
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: 1.71.0
+        default: true
+        profile: minimal
+        components: clippy
+
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: nightly
+        profile: minimal
+        components: fmt
+
+    - name: cargo fmt
+      run: cargo +nightly fmt -- --check
+
+    - name: cargo clippy
+      run: cargo clippy --all --all-targets -- -D clippy::all
+
+    - name: cargo test
+      run: cargo test --all --all-targets