fix(bump): Support regexes containing colons

The version_files feature uses a colon to delimit filenames from a regex
to use to find the version. Make version_files slightly more robust by
splitting on the first colon rather than all colons, thereby permitting
the regex to contain a colon. Maintain the pre-existing assumption that
the filename doesn't contain a colon, as this is rare and would likely
cause many other problems.

Author: Kurt-von-Laven

commitizen/bump.py

@@ -141,8 +141,7 @@ def update_version_in_files(
     """
     # TODO: separate check step and write step
     for location in files:
-        filepath, *regexes = location.split(":")
-        regex = regexes[0] if regexes else None
+        filepath, _, regex = location.partition(":")
 
         with open(filepath, "r") as f:
             version_file = f.read()