fix: Add detailed license information in setup.cfg (#54)

* Add detailed license information in setup.cfg

* fix: remove license classifier and fix metadata key

Author: MattTheCuber

setup.cfg

@@ -7,7 +7,7 @@ description_file = README.md
 author = William Silversmith
 author_email = [email protected]
 home_page = https://github.com/seung-lab/fastremap/
-licenses = LGPL-3.0
+license = LGPL-3.0
 classifier =
     Intended Audience :: Developers
     Development Status :: 5 - Production/Stable
@@ -28,4 +28,4 @@ setup_hooks =
 packages = fastremap
 
 [bdist_wheel]
-universal = 0
+universal = 0