Updates version number to 0.4.188210387.20180307.

Significant changes:
- Fixed indexing issue for Swift test targets.
- Improved Scheme generation and Swift indexing for device.

PiperOrigin-RevId: 188211040

src/XcodeConfig/TulsiVersion.xcconfig

diff --git a/src/XcodeConfig/TulsiVersion.xcconfig b/src/XcodeConfig/TulsiVersion.xcconfig
index 1183149..85c1146 100644
--- a/src/XcodeConfig/TulsiVersion.xcconfig
+++ b/src/XcodeConfig/TulsiVersion.xcconfig
@@ -8,8 +8,8 @@
 // Version number (recorded into the Info.plist)
 TULSI_VERSION_MAJOR = 0
 TULSI_VERSION_MINOR = $(GOOGLE_VERSION_BUILDNUMBER)
-TULSI_VERSION_FIXLEVEL = 187349144
-TULSI_VERSION_BUILDNUMBER = 20180228
+TULSI_VERSION_FIXLEVEL = 188210387
+TULSI_VERSION_BUILDNUMBER = 20180307
 
 TULSI_VERSION_COPYRIGHT = 2015-2018