Update Simpay API version to 3.0.1

The Simpay API version has been updated from 3.0 to 3.0.1 in the setup.py file, which is a Python wrapper for the Simpay API. The long description of the package is now read from README.md and its content type is set as text/markdown.

Author: DarkGL

setup.py

@@ -4,7 +4,7 @@
 
 setup(
     name='simpay-api',
-    version='3.0',
+    version='3.0.1',
     description='Python wrapper for Simpay API',
     long_description=open('README.md', encoding='utf-8').read(),
     long_description_content_type="text/markdown",