Fix version comparison in show_startup_info.
Fix version comparison in show_startup_info.

The description of startup_info_version in the manual says "only messages
relating to a Kakoune version greater than this value will be displayed,"
but showed messages relating to the version equal to that value.

This change aligns the code with the manual and makes a workaround that set
startup_info_version next to the original version (ex. 20200117) unnecessary.

Signed-off-by: Masanori Ogino <c49462fef669560e618607913e6c283f7627123c@gmail.com>

lenormf/kakoune,alexherbo2/kakoune,casimir/kakoune,Somasis/kakoune,danr/kakoune,occivink/kakoune,alexherbo2/kakoune,occivink/kakoune,Somasis/kakoune,mawww/kakoune,mawww/kakoune,danr/kakoune,alexherbo2/kakoune,Somasis/kakoune,Somasis/kakoune,jkonecny12/kakoune,mawww/kakoune,lenormf/kakoune,alexherbo2/kakoune,mawww/kakoune,jkonecny12/kakoune,jkonecny12/kakoune,danr/kakoune,occivink/kakoune,jkonecny12/kakoune,lenormf/kakoune,danr/kakoune,occivink/kakoune,lenormf/kakoune,casimir/kakoune,casimir/kakoune,casimir/kakoune