Add GitHub actions

Author: jayvdb

.github/workflows/main.yml

@@ -0,0 +1,35 @@
+on: [push, pull_request]
+
+name: CI
+
+jobs:
+  build_and_test:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          components: rustfmt, clippy
+      - uses: actions-rs/cargo@v1
+        name: Build
+        with:
+          command: build
+          args: --release --all-features
+      - uses: actions-rs/cargo@v1
+        name: Test
+        with:
+          command: test
+      - uses: actions-rs/cargo@v1
+        name: rustfmt
+        with:
+          command: fmt
+          args: --all -- --check
+      - uses: actions-rs/cargo@v1
+        name: clippy
+        with:
+          command: clippy
+          args: -- -D warnings