pypi version is inconsistent

[rwbaer]

In trying to track down the status of issue #268, I discovered that the current pypi version is listed as 2.13.0, but the __init__.py file still lists the version as 2.12.1. Not sure which is the canonical version number.

Incidently, the indent issue mentioned in #268 does not appear fixed in the current pypi version. From pypi version supposedly 2.13.0 __init__.py
:

"""Powerful and Lightweight Python Tree Data Structure."""

__version__ = "2.12.1"
__author__ = "c0fec0de"
__author_email__ = "c0fec0de@gmail.com"
__description__ = """Powerful and Lightweight Python Tree Data Structure."""
__url__ = "https://github.com/c0fec0de/anytree"