Change package name and match github's description (#53)

Author: kilicluka

setup.cfg

@@ -1,9 +1,9 @@
 [metadata]
-name = infobip-channels
+name = infobip-api-python-sdk
 version = 1.0.0
 author = Luka Kilic
 author_email = kilic.luka@gmail.com
-description = Infobip channels API client
+description = Python sdk for Infobip's API
 long_description = file: README.md
 long_description_content_type = text/markdown
 keywords = infobip, sdk, channels, whatsapp, api