Updates version number to 0.4.304389627.20200402.

Significant changes:
- Fixed a race condition that can cause a segmentation fault.
- Fixed issue where having multiple tests in a test_suite with
  the same target name would lead to issues running all tests.

PiperOrigin-RevId: 304399596
diff --git a/version.bzl b/version.bzl
index 046ddb0..35835bf 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 = "300545308"
+TULSI_VERSION_FIXLEVEL = "304389627"
 
-TULSI_VERSION_DATE = "20200312"
+TULSI_VERSION_DATE = "20200402"
 
 TULSI_VERSION_COPYRIGHT = "2015-2018"