Update Swift to 4.0.3, include tz package.

library/swift

@@ -2,10 +2,10 @@ Maintainers: Haris Amin <[email protected]> (@hamin),
              Thomas Catterall <[email protected]> (@swizzlr)
 GitRepo: https://github.com/swiftdocker/docker-swift.git
 
-Tags: 4.0.2, 4.0, 4, latest
-GitCommit: 5c83628d4696bca62aec3136a4ee9b854e8d548e
+Tags: 4.0.3, 4.0, 4, latest
+GitCommit: bc8cb3032ffd6a05d3eddf9cf885139277c11642
 Directory: 4.0
 
 Tags: 3.1.1, 3.1, 3
-GitCommit: 5c83628d4696bca62aec3136a4ee9b854e8d548e
+GitCommit: bc8cb3032ffd6a05d3eddf9cf885139277c11642
 Directory: 3.1