Changelog for ruby2.6-rubygem-pg-doc-0-0.21.0-4.9.x86_64.rpm :
Sat Jan 19 13:00:00 2019 Marcus Rueckert
- rb_build_ruby_abi needs to be rb_build_ruby_abis

Fri Jan 18 13:00:00 2019 Marcus Rueckert
- use rb_build_ruby_abi instead of rb_default_ruby_abi

Mon Aug 27 14:00:00 2018 Marcus Rueckert
- provide 0.x branch too