Ci test (#113)

add rust-src to the github action using rusttoolchain

.github/workflows/cargo-tests.yml

@@ -53,9 +53,8 @@ jobs:
 
       - name: install rust toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
-
-      - name: Add required rustup component
-        run: rustup component add rust-src 
+        with:
+          components: rust-src
 
       - name: Install toml-sort
         run: cargo install --git https://github.com/4meta5/toml_sort