see what happens if tests are not checked separately (#384)

They are built later so that should be redundant, maybe it can save
some significant time to skip it.

Author: Byron

.github/workflows/ci.yml

@@ -45,7 +45,7 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: check
-          args: --all --bins --tests --examples
+          args: --all --bins --examples
       - run: git lfs fetch && git lfs checkout
       - uses: taiki-e/install-action@v1
         with: