Bump version to 0.4.3

Author: Olivier Chédru

setup.py

@@ -23,7 +23,7 @@
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='0.4.2',
+    version='0.4.3',
 
     description='Check python packages from requirement.txt and report issues',
     long_description=long_description,