fix(cz_customize): derive bump_map_major_version_zero from custom bump_map#1977

bearomorphism wants to merge 1 commit intocommitizen-tools:mastercommitizen-tools/commitizen:masterfrom

bearomorphism:fix/1728-customize-bump-map-derivebearomorphism/commitizen:fix/1728-customize-bump-map-deriveCopy head branch name to clipboard