ci: modify ci.yml to let cargo fmt/clippy runs on nightly channel (#273)

Author: Lzzzzzt

.github/workflows/ci.yml

@@ -31,20 +31,22 @@ jobs:
       - name: Cache
         uses: Swatinem/rust-cache@v1
       - name: Run cargo fmt
+        if: matrix.channel == 'nightly'
         uses: actions-rs/cargo@v1
         with:
           command: fmt
           args: --all -- --check
-      - name: Run cargo check with no default features
-        uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: --no-default-features
       - name: Run cargo clippy
+        if: matrix.channel == 'nightly'
         uses: actions-rs/cargo@v1
         with:
           command: clippy
           args: -- -D warnings
+      - name: Run cargo check with no default features
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --no-default-features
       - env:
           CHANNEL: ${{ matrix.channel }}
           CROSS: ${{ !startsWith(matrix.target, 'x86_64') && contains(matrix.target, 'linux') && '1' || '0' }}
@@ -106,4 +108,4 @@ jobs:
           - target: i686-pc-windows-msvc
             os: windows-latest
           - target: i686-pc-windows-gnu
-            os: windows-latest
+            os: windows-latest