Swift-NIO-SSH 0.1.0

SemVer Minor

• Implement certified public key client auth (#64)

SemVer Patch

• Use welcoming language (#67)
• Implement client port forwarding example (#55)
• Use getpass to retrieve password from user (#53, patch credit to @helje5)
• Resolve stalls in the example client (#52)
• Swap C and D - README typo correction (#51)
• Add docs generation script. (#47)
• Use newer bytebuffer write functions (#44)
• Initialize state machine on handlerAdded (#43)
• No creating SSH channels after disconnect (#41)
• Do not lose data on channel close (#40)
• Do not hold on to pending channels after close (#38)
• Forbid creating new channels after TCP shutdown. (#37)
• Properly handle autoread (#35)

Other Changes

• Update code of conduct to version 1.4 (#72)
• Don't install Jazzy on Xenial (#33)
• Swift 5.3-RELEASE is here, let's use it (#45)