must rename charstrings dict if CFF2 table has been loaded
must rename charstrings dict if CFF2 table has been loaded

integration tests where failing with cffsubr==0.2.7 because with the latter the subroutinized CFF2 table was partly decompiled, thus was still using the old names. See

https://travis-ci.org/github/googlefonts/ufo2ft/builds/727087926?utm_source=github_status&utm_medium=notification

googlei18n/ufo2ft,jamesgk/ufo2fdk,moyogo/ufo2ft,googlefonts/ufo2ft