Use build matrix

Author: jiegec

.github/workflows/rust.yml

@@ -10,35 +10,14 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust: [nightly-2020-02-01, nightly-2020-02-03, nightly-2020-03-01, nightly-2020-03-02]
 
     steps:
     - uses: actions/checkout@v2
-    - name: Use nightly-2020-02-01
-      run: rustup default nightly-2020-02-01
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
-    - name: Use nightly-2020-02-02
-      run: rustup default nightly-2020-02-02
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
-    - name: Use nightly-2020-02-03
-      run: rustup default nightly-2020-02-03
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
-    - name: Use nightly-2020-03-01
-      run: rustup default nightly-2020-03-01
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --verbose
-    - name: Use nightly-2020-03-02
-      run: rustup default nightly-2020-03-02
+    - name: Use ${{ matrix.rust }}
+      run: rustup default ${{ matrix.rust }}
     - name: Build
       run: cargo build --verbose
     - name: Run tests