try excluding the failing IO test

2 jobs for <span class="ref-name">menpo_try</span> in 29 minutes and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #163006
docker
build_linux

00:29:13

69.0%
passed #163007
macosx
build_macosx

00:18:51

69.0%