chore: update gitlab-ci.

Author: jrjrmiih

.gitlab-ci.yml

@@ -47,6 +47,7 @@ run_test:
     - for file in $FILES; do
         clang-format "$file" | colordiff -u "$file" -;
       done
+    - rm -rf target
     - cargo clean
     - cargo fmt -- --check
     - cargo test -- --test-threads=1