Reverse dependencies for scale.rb

Latest version of the following gems require scale.rb

Gem	Version	Date	Downloads
substrate_client.rb +15.4 Thousand Downloads	`0.1.9` November 01, 2020	November 01, 2020	15.4 Thousand
substrate_client +2.37 Thousand Downloads	`0.1.0` April 08, 2020	April 08, 2020	2.37 Thousand
substrate-nft-tracker +2.35 Thousand Downloads	`0.1.0` August 24, 2021	August 24, 2021	2.35 Thousand