feature/separate-mode-from-semver-package

[shiouen]

• breaking changes to the semverbot config file
• semver level mappings are now re-usable among different modes and do not need special characters anymore
• the special characters are now part of the logic of modes (git-branch and git-commit specifically) in the form of delimiters
• added sensible defaults for the delimiters
• made the delimiters configurable
• fixed a bug with prefixing git tags
• some code refactors