data sources: rename 'alter_data' to 'transform'
data sources: rename 'alter_data' to 'transform'

ceseale/tangram,taylorhxu/tangram,DHaylock/tangram,rosamcgee/tangram,zerebubuth/tangram,tangrams/tangram,ceseale/tangram,xvilan/tangram,rosamcgee/tangram,TitoAgudelo/tangram,taylorhxu/tangram,DHaylock/tangram,TitoAgudelo/tangram,xvilan/tangram,taylorhxu/tangram,zerebubuth/tangram,zerebubuth/tangram,DHaylock/tangram,TitoAgudelo/tangram,tangrams/tangram,xvilan/tangram,rosamcgee/tangram,ceseale/tangram