Bump development status

Author: dstansby

setup.cfg

@@ -9,7 +9,7 @@ author_email = d.stansby@ucl.ac.uk
 license = BSD-3-Clause
 license_file = LICENSE
 classifiers =
-    Development Status :: 2 - Pre-Alpha
+    Development Status :: 3 - Alpha
     Framework :: napari
     Intended Audience :: Developers
     License :: OSI Approved :: BSD License