fix for incompatible address on restart (statianzo#186)

Previously when a listener would restart because of an error while on
an IPv6 address it would give an error ‘An address incompatible with
the requested protocol was used’. This fixes the issue.

Merge pull request statianzo#181 from jespertheend/restart-listner-wi…

…th-flag

added RestartAfterListenError

Bump to 0.11.1

Bump to 0.11.0

SubProtocol Support

Bump to version 0.9.6

Bump to version 0.9.5

Bump to version 0.9.4

Bump to version 0.9.3

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