Use git submodule

[typebrook]

Repo for map styles is here, use command below to add submodule:

git submodule add git@github.com:GeoThings/map-styles.git [path of submodule]

[typebrook]

Just keep in mind: using submodule in Bitrise may need to renew SSH key, see tutorial:
https://devcenter.bitrise.io/faq/adding-projects-with-submodules/

and generate key in Bitrise APP settings page: https://app.bitrise.io/app/[App id]#/settings