Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-1.8.3.dev0
+1.8.3
  * #665: BREAKING: Simplify logging logic as follows: Syslog verbosity is now disabled by
    default, but setting the "--syslog-verbosity" flag enables it regardless of whether you're at an
    interactive console. Additionally, "--log-file-verbosity" and "--monitoring-verbosity" now

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.8.3.dev0'
+VERSION = '1.8.3'
 
 
 setup(