Merge pull request httpswift#415 from Vkt0r/1.4.7

Release 1.4.7

Merge pull request httpswift#373 from httpswift/1.4.6

Bump version to 1.4.6 for Swift 5

Change version to 1.4.3

Merge pull request httpswift#317 from oliveroneill/server-start-bug

Fix bug where server may fail to start

Change version to 1.4.1.

Swift 4