- replace nodegit with isomorphic-git
- read credentials from git credential store file by default
- add git category to playbook schema
- allow credentials file to be passed via GIT_CREDENTIALS_PATH environment variable
- allow credentials file to be passed via --git-credentials-path CLI option
- allow credentials to be passed via ANTORA_GIT_CREDENTIALS env var
- automatically coerce git SSH URL to HTTPS URL
- store cloned repositories under version folder inside content cache dir
- reset progress bar on fetch error (replace with ? marks)
- use git server in test suite to test remote git repositories
- simplify progress bar management
- use event to terminate progress bar