[pygobject] setup.py: use .dev0 instead of .dev

[Christoph Reiter <creiter src gnome org>]

commit 6161e6e8b4472b0b56f8d0be9f448cf8ab252685
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Mon Apr 9 16:37:28 2018 +0200

    setup.py: use .dev0 instead of .dev
    
    setuptools prints a warning each time that it has normalized the version.

 setup.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/setup.py b/setup.py
index 1114b9e5..658597d7 100755
--- a/setup.py
+++ b/setup.py
@@ -1083,7 +1083,7 @@ def main():
     if is_dev_version():
         # This makes it a PEP 440 pre-release and pip will only install it from
         # PyPI in case --pre is passed.
-        version += ".dev"
+        version += ".dev0"
 
     setup(
         name=pkginfo["Name"],