Rename config.yaml to config.yml

Author: gkorland

.circleci/config.yaml .circleci/config.yml.circleci/config.yaml renamed to .circleci/config.yml

@@ -52,4 +52,4 @@ jobs:
 
       - run:
           name: Run all tests
-          command: cargo test --all
+          command: cargo test --all