Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-1.7.3.dev0
+1.7.3
  * #357: Add "break-lock" action for removing any repository and cache locks leftover from Borg
    aborting.
  * #360: To prevent Borg hangs, unconditionally delete stale named pipes before dumping databases.

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.7.3.dev0'
+VERSION = '1.7.3'
 
 
 setup(