Add x86_64-darwin-20 platform to the Gemfile
Add x86_64-darwin-20 platform to the Gemfile

Otherwise people developping on Big Sur will have to rebundle

kddeisz/rails,kmcphillips/rails,rails/rails,BlakeWilliams/rails,Envek/rails,joonyou/rails,Edouard-chin/rails,georgeclaghorn/rails,Edouard-chin/rails,Edouard-chin/rails,kddeisz/rails,Erol/rails,esparta/rails,rails/rails,BlakeWilliams/rails,lcreid/rails,joonyou/rails,yahonda/rails,kddeisz/rails,Vasfed/rails,Vasfed/rails,Envek/rails,georgeclaghorn/rails,Stellenticket/rails,yawboakye/rails,yahonda/rails,lcreid/rails,georgeclaghorn/rails,joonyou/rails,EmmaB/rails-1,rails/rails,Erol/rails,yawboakye/rails,Erol/rails,Envek/rails,joonyou/rails,kmcphillips/rails,Stellenticket/rails,rails/rails,EmmaB/rails-1,kmcphillips/rails,yahonda/rails,kddeisz/rails,BlakeWilliams/rails,BlakeWilliams/rails,Vasfed/rails,Edouard-chin/rails,MSP-Greg/rails,Vasfed/rails,Stellenticket/rails,esparta/rails,esparta/rails,yahonda/rails,EmmaB/rails-1,Stellenticket/rails,esparta/rails,MSP-Greg/rails,yawboakye/rails,lcreid/rails,georgeclaghorn/rails,kmcphillips/rails,Erol/rails,MSP-Greg/rails,Envek/rails,lcreid/rails,yawboakye/rails,MSP-Greg/rails