Bump version for release.

NEWS

@@ -1,4 +1,4 @@
-1.8.6.dev0
+1.8.6
  * #767: Add an "--ssh-command" flag to the "config bootstrap" action for setting a custom SSH
    command, as no configuration is available (including the "ssh_command" option) until
    bootstrapping completes.

setup.py

@@ -1,6 +1,6 @@
 from setuptools import find_packages, setup
 
-VERSION = '1.8.6.dev0'
+VERSION = '1.8.6'
 
 
 setup(