improvement: update setup.cfg for new version

Author: leafcoder

setup.cfg

@@ -1,14 +1,14 @@
 [metadata]
 name = django_covid19
-version = 0.3beta
-description = A real-time interface django app for 2019-nCoV.
+version = 0.4a0
+description = An django app of the covid-19 API in countries around the world, provinces and cities in China, and states in the USA. 
 long_description = file: README.md
 long-description-content-type = text/markdown
 url = https://github.com/leafcoder/django-covid19
 author = leafcoder
 author_email = leafcoder@gmail.com
 license = MIT
-keywords = python django Covid19 2019-nCoV app
+keywords = python django covid19 2019-ncov app
 classifiers =
     Environment :: Web Environment
     Framework :: Django