* Add language support metadata to the OFL families.
* Add language support metadata to all apache/ufl fonts.
* Add language support metadata / sample text to remaining OFL families.
* [gftools-packager] STIX Two Text: Version 2.12 b168 added
* STIX Two Text Version 2.12 b168 taken from the upstream repo https://github.com/stipub/stixfonts at commit 2e94666780.
* [gftools-packager] ofl/stixtwotext remove METADATA "source". google/fonts#2587