Heroku: Heroku renamed the included-spec fields for Postgres Standard-10 from disk_size and connection_limit to disk and connec…

{"ram":"1 TB","disk_size":"8 TB","connection_limit":"500"} → {"ram":"1 TB","disk":"8 TB","connections":"500"}

Heroku renamed the included-spec fields for Postgres Standard-10 from disk_size and connection_limit to disk and connections. The values were unchanged at 1 TB RAM, 8 TB disk and 500 connections.