Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-1.2.15.dev0
+1.2.15
  * #127: Remove date echo from schema example, as it's not a substitute for real logging.
  * #132: Leave exclude_patterns glob expansion to Borg, since doing it in borgmatic leads to
    confusing behavior.

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 
-VERSION = '1.2.15.dev0'
+VERSION = '1.2.15'
 
 
 setup(