add new step to ci to reflect local changes

.github/workflows/cargo-tests.yml

@@ -54,6 +54,9 @@ jobs:
       - name: install rust toolchain
         uses: actions-rust-lang/setup-rust-toolchain@v1
 
+      - name: Add required rustup component
+        uses: rustup component add rust-src 
+
       - name: Install toml-sort
         run: cargo install --git https://github.com/4meta5/toml_sort
       - name: Add file permissions for toml-sort