Switch bumpversion cfg to pyproject

Author: ndevenish

.bumpversion.cfg

@@ -3,9 +3,9 @@ current_version = 0.30.1
 commit = True
 tag = True
 
-[bumpversion:file:setup.cfg]
-search = version = {current_version}
-replace = version = {new_version}
+[bumpversion:file:pyproject.toml]
+search = version = "{current_version}"
+replace = version = "{new_version}"
 
 [bumpversion:file:src/zocalo/__init__.py]
 search = __version__ = "{current_version}"