Updates version number to 0.4.225407617.20181213.

Significant changes:
- Register kubectl toolchain rule globally

PiperOrigin-RevId: 225439687
diff --git a/version.bzl b/version.bzl
index bbc9c09..19b3f45 100644
--- a/version.bzl
+++ b/version.bzl
@@ -4,9 +4,9 @@
 # Version number (recorded into the Info.plist)
 TULSI_VERSION_MAJOR = "0"
 
-TULSI_VERSION_FIXLEVEL = "224504172"
+TULSI_VERSION_FIXLEVEL = "225407617"
 
-TULSI_VERSION_DATE = "20181207"
+TULSI_VERSION_DATE = "20181213"
 
 TULSI_VERSION_COPYRIGHT = "2015-2018"