add rustfmt step to ci (#90)

Author: mfreeborn

.github/workflows/dev_ci.yml

@@ -17,6 +17,8 @@ jobs:
       - uses: actions/checkout@v2
       - name: build_linux
         run: cargo build --all-features --verbose --release
+      - name: rustfmt
+        run: cargo fmt --all -- --check
       - name: Run tests
         run: cargo test --features plotly_ndarray,kaleido --release --verbose
       - name: Run basic charts

.github/workflows/release_ci.yml

@@ -17,6 +17,8 @@ jobs:
       - uses: actions/checkout@v2
       - name: build_linux
         run: cargo build --all-features --verbose --release
+      - name: rustfmt
+        run: cargo fmt --all -- --check
       - name: Run tests
         run: cargo test --features plotly_ndarray,kaleido --release --verbose
       - name: Run basic charts