git actions (#5)

* add build action

* publish job

.github/workflows/build.yml

@@ -0,0 +1,45 @@
+name: Cargo Build and Test
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+   
+concurrency:
+  group: ${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build_and_test:
+    name: WHAM Test
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        toolchain:
+          - stable
+          - beta
+          - nightly
+    steps:
+      - uses: actions/checkout@v3
+      - run: rustup update ${{ matrix.toolchain }} && rustup default ${{ matrix.toolchain }}
+      - run: cargo build --verbose
+      - run: cargo test --verbose
+
+  publish:
+    name: WHAM Publish
+    runs-on: ubuntu-latest
+    needs: [build_and_test]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - uses: katyo/publish-crates@v2
+        with:
+            registry-token: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+            ignore-unpublished-changes: true
+            dry-run: ${{ github.event_name != 'push' }}
+