Add CI pipeline

.github/workflows/ci.yml

@@ -0,0 +1,50 @@
+name: CI
+
+on:
+    push:
+        branches:
+        - main
+    pull_request:
+        branches:
+        - main
+
+env:
+    RUSTFLAGS: -Dwarnings
+
+jobs:
+    test:
+        name: Test
+        runs-on: ubuntu-latest
+        steps:
+        - uses: actions/checkout@v2
+        - name: Install Rust
+          uses: actions-rs/toolchain@v1
+          with:
+            toolchain: stable
+            override: true
+        - name: Run tests
+          run: cargo test --all
+    clippy:
+        name: Clippy
+        runs-on: ubuntu-latest
+        steps:
+        - uses: actions/checkout@v2
+        - name: Install Rust
+          uses: actions-rs/toolchain@v1
+          with:
+            toolchain: stable
+            override: true
+        - name: Run clippy
+          run: cargo clippy --all -- -D warnings
+    fmt:
+        name: Fmt
+        runs-on: ubuntu-latest
+        steps:
+        - uses: actions/checkout@v2
+        - name: Install Rust
+          uses: actions-rs/toolchain@v1
+          with:
+            toolchain: stable
+            override: true
+        - name: Run fmt
+          run: cargo fmt --all -- --check