MAJOR point release! long-options renamed to be POSIX compliant.

Prior to v4.0.0 of lsseq all the long-option names used a "camel case" naming convention but as of v4.0.0 all long-option names have been changed to so-called "kebab case".

Please refer to the README.md and specifically "Important: latest MAJOR point release of lsseq" for a fuller description of this release and some helpful tips on how to ease updating to from an earlier MAJOR point releases to this release.