update metadata

Author: joeljonsson

setup.cfg

@@ -2,16 +2,16 @@
 name = pyapr
 author = Joel Jonsson, Bevan Cheeseman
 author_email = jonsson@mpi-cbg.de
-description = Python wrappers for LibAPR
+description = Content-adaptive image processing using the Adaptive Particle Representation
 long_description = file: README.md
 long_description_content_type = text/markdown
-url = https://github.com/AdaptiveParticles/PyLibAPR
+url = https://github.com/AdaptiveParticles/pyapr
 license = Apache-2.0
 classifiers =
-    Development Status :: 2 - Pre-Alpha
+    Development Status :: 4 - Beta
     Intended Audience :: Developers
     License :: OSI Approved :: Apache Software License
-    Programming Language :: Python ::
+    Programming Language :: Python :: 3
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8