Typo of function name com.fasterxml.jackson.core.Version.isUknownVersion()

[timrau]

The name of function com.fasterxml.jackson.core.Version.isUknownVersion() is incorrectly spelled.
It should be isUnknownVersion().

[cowtowncoder]

Yes, so it seems. Surprising no one noticed this before...

[cowtowncoder]

Added properly spelled variant, isUnknownVersion(), deprecated existing one. Can not really remove at this point, in case someone is calling that method; may be removed from 3.0, eventually.
Thanks!