chore: setup.cfg: version = attr: gyp.VERSION (#171)

Author: cclauss

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = gyp-next
-version = attr: pylib/gyp.VERSION
+version = attr: gyp.VERSION
 description = A fork of the GYP build system for use in the Node.js projects
 long_description = file: README.md
 long_description_content_type = text/markdown