Add step to check all the places

Author: aleics

.github/workflows/ci.yml

@@ -21,6 +21,13 @@ jobs:
           override: true
           components: rustfmt, clippy
 
+      - name: check
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --all-features --examples --tests --benches
+          toolchain: nightly
+
       - name: build
         uses: actions-rs/cargo@v1
         with: