maint: Update DOAP file

Point to correct location of wiki, new bug tracker, correct mailing list,
and add Cosimo to the maintainers and remove Colin.
4 jobs for 86-silently-leaked-return-value-of-callbacks in 23 minutes and 43 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build
passed fedora_clang #5742

00:12:29

70.6%
passed fedora_cppcheck #5743

00:00:26

passed fedora_gcc #5741

00:10:47

 
  Failure
skipped on_failure #5744