Updates version number to 0.4.263367181.20190814.

Significant changes:
- Added a warning for when iOS targets have different minimum OS
  versions.

PiperOrigin-RevId: 263388151
diff --git a/version.bzl b/version.bzl
index 5d5d37e..d480048 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 = "261170668"
+TULSI_VERSION_FIXLEVEL = "263367181"
 
-TULSI_VERSION_DATE = "20190801"
+TULSI_VERSION_DATE = "20190814"
 
 TULSI_VERSION_COPYRIGHT = "2015-2018"