Check code with rustfmt not to introduce format commits (#88)

.github/workflows/clippy.yml

@@ -2,19 +2,31 @@ on:
   pull_request:
     types: [opened, synchronize, reopened]
 
-name: Clippy Check
+name: Clippy and rustfmt Check
 jobs:
   clippy_check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          components: rustfmt
+          override: true
+      - name: Check with rustfmt
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: nightly
-          profile: minimal
           components: clippy
           override: true
-      - uses: actions-rs/clippy-check@v1
+      - name: Check with Clippy
+        uses: actions-rs/clippy-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           args: --all-features --all --tests