Update to use forked solidus_frontend when needed

Author: waiting-for-dev

Gemfile

@@ -4,7 +4,13 @@ source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 branch = ENV.fetch('SOLIDUS_BRANCH', 'master')
-gem 'solidus', github: 'solidusio/solidus', branch: branch
+solidus_git, solidus_frontend_git = if (branch == 'master') || (branch >= 'v3.2')
+                                      %w[solidusio/solidus solidusio/solidus_frontend]
+                                    else
+                                      %w[solidusio/solidus] * 2
+                                    end
+gem 'solidus', github: solidus_git, branch: branch
+gem 'solidus_frontend', github: solidus_frontend_git, branch: branch
 
 # Needed to help Bundler figure out how to resolve dependencies,
 # otherwise it takes forever to resolve them.