Bumped npm,pypi versions to 2.0.13 to test publish.

The way I was publishing the Python package was annoying.
I found a better way to authenticate myself to pypi.org,
but I needed to test it. This required bumping the version
numbers of the packages. There is no difference between
2.0.12 and 2.0.13.

source/python/publish

@@ -1,4 +1,5 @@
 #!/bin/bash
+rm -f dist/*
 python3 -m build || exit $?
-python3 -m twine upload dist/* || exit $?
+python3 -m twine upload --repository astronomy-engine dist/* || exit $?
 exit 0

source/python/setup.py

@@ -2,7 +2,7 @@ from setuptools import setup
 
 setup(
     name='astronomy-engine',
-    version='2.0.12',
+    version='2.0.13',
     description='Astronomy calculation for Sun, Moon, and planets.',
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',