bump minor version for read-fonts and write-fonts

[anthrotype]

bumping minor because STAT.offset_to_axis_values is now nullable after #716

 Changes for read-fonts from read-fonts-v0.13.2 to 0.14.0
         f99b59d [read|write-fonts] make offset_to_axis_values nullable
 Changes for write-fonts from write-fonts-v0.18.0 to 0.19.0
         f99b59d [read|write-fonts] make offset_to_axis_values nullable
         dec4e1b [graph] Move assert to after space check
         e1b9cea [splitting] More careful in handling TableType
         48670bb [write-fonts] add SegmentMaps::is_identity method (#715)
         08d6264 [chore] Bump patch version on read-fonts & font-types
         c745d86 [chore] symlink license files to crate roots
         16daacf Bump read-fonts to 0.13.1
         d04b9bb Enable old gpos spec tests
         0a66324 [write-fonts] Full pack/split test for MarkBase
         edf8bdd [write-fonts] More & better testing of MarkBase splitting
         74bb1b0 [write-fonts] Test for splitting of mark & base arrays
         e4e1c68 [write-fonts] Preliminary impl of MarkBase splitting

[anthrotype]

I did not bump skrifa as well, because I wasn't sure if it was release-able or whether others are working on something that they'd like to wait before releasing.
But now I believe I should do skrifa as well, because fontc requires skrifa (or at least one of its tests does, not the main lib) and if I then bump read-fonts and write-fonts in fontc, there would be two conflicting read-fonts versions (the new one and the old requried by skrifa)... Is my understanding correct?

[anthrotype]

Looks like I also have to bump skrifa, minor because read-fonts on which skrifa depends contains a breaking change. However, skrifa itself does not seem to be using the STAT code that contains the breaking change...

[cmyr]

yea it doesn't matter if it uses it, because it uses other types in public API. Also in the future you should feel free to self-approve version bump PRs, no fun being blocked for a day when you're just trying to do a release.