bump to 0.4.1

I was going to set the version to 0.4.0 but found out:

 - `0.4.0` was released to PyPi in Dec 3, 2020: https://pypi.org/project/Figures/0.4.0/
 - There were not git tag on GitHub

So I "fixed" the situation by:
 - Jumping from 0.4.dev17 to 0.4.1
 - I made a backtracking git 0.4.0 tag on GitHub: https://github.com/appsembler/figures/releases/tag/0.4.0

setup.py

@@ -26,7 +26,7 @@
 
 setup(
     name='Figures',
-    version='0.4.dev17',
+    version='0.4.1',
     packages=find_packages(),
     include_package_data=True,
     license='MIT',