Updates version number to 0.4.251736730.20190605.

Significant changes:
- Defines with spaces are now handled properly.

PiperOrigin-RevId: 251872872
diff --git a/version.bzl b/version.bzl
index f61a219..80207c0 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 = "249658920"
+TULSI_VERSION_FIXLEVEL = "251736730"
 
-TULSI_VERSION_DATE = "20190523"
+TULSI_VERSION_DATE = "20190605"
 
 TULSI_VERSION_COPYRIGHT = "2015-2018"