Update version number and metadata.

Author: feilong

setup.cfg

@@ -1,17 +1,23 @@
 [metadata]
 name = brainplotlib
-version = 0.4.1
+version = 0.5.0
 author = Ma Feilong
 author_email = mafeilong@gmail.com
 description = A lightweight package to plot brain surfaces with Python.
 long_description = file: README.md
 long_description_content_type = text/markdown
 keywords = brain, surface, fmri, plotting, visualization
-url = https://github.com/feilong/brainplotlib
+url = https://feilong.github.io/brainplotlib/
 project_urls =
     Bug Tracker = https://github.com/feilong/brainplotlib/issues
+    Source Code = https://github.com/feilong/brainplotlib
 classifiers =
-    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
 
 [options]
 package_dir =