Merge branch 'master' of github.com:libvips/nip2 into fix-marshal-types
      

add 8.6 compat and mitchell
      

add 8.6 compat and mitchell
      

more -V output
      and some small cleanups

bump version in docs
      

bump version in docs
      

better compat handling
      we could produce spurious compat warnings before

fix up .desktop file
      and add an icon

oop, forgot the micro v number
      configure.ac didn't set micro

v 8.2.1