fix: sweep the child's process group after every phase - #650

fix: sweep the child's process group after every phase#650

ykhrustalev wants to merge 2 commits into

sourcefrog:mainsourcefrog/cargo-mutants:mainfrom

ykhrustalev:ykhrustalev/sweep-process-groupykhrustalev/cargo-mutants:ykhrustalev/sweep-process-groupCopy head branch name to clipboard