update ci.yml

Author: o2sh

Diff for: .github/workflows/ci.yml

@@ -6,12 +6,13 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
-        rust: [stable]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        rust: [stable, nightly]
 
     steps:
-    - uses: actions/checkout@v1
-    - name: Build
-      run: cargo build --verbose
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: ${{ matrix.rust }}
+    - uses: actions/checkout@master
     - name: Run tests
       run: cargo test --verbose