Update the package metadata

Author: ArtyomVancyan

setup.cfg

@@ -3,16 +3,19 @@ name = django-mermaid
 version = attr: django_mermaid.__version__
 author = Artyom Vancyan
 author_email = [email protected]
-description = Django template tag for rendering mermaid diagrams
+description = Django template tag for rendering mermaid diagrams.
 long_description = file: README.md
 long_description_content_type = text/markdown
 url = https://github.com/ArtyomVancyan/django-mermaid
 keywords =
     python
     django
     mermaid
-    mermaid-diagrams
-    django-templatetag
+    tag
+    graph
+    jinja
+    diagram
+    template
 license = MIT
 license_file = LICENSE
 platforms = unix, linux, osx, win32