Ruby 2.6 deprecations removed in Ruby 2.7

[andrewhavens]

Apparently there are some deprecated calls that need to be updated.

https://motioneers.slack.com/archives/C055RS0VA/p1588922704034900

I have the following errors running rake in RubyMotion, using Redpotion gem (promotion).
/usr/local/Cellar/ruby/2.7.1_2/lib/ruby/gems/2.7.0/gems/ProMotion-3.0.0/lib/ProMotion.rb:9: warning: deprecated Object#=~ is called on Array; it always returns nil
/usr/local/Cellar/ruby/2.7.1_2/lib/ruby/gems/2.7.0/gems/ProMotion-3.0.0/lib/ProMotion.rb:9: warning: deprecated Object#=~ is called on Array; it always returns nil
rake aborted!
NoMethodError: undefined method new' for BigDecimal:Class /Users/username/Documents/ruby-projects/ipu/my_new_app/Rakefile:7:in <top (required)>'
(See full trace by running task with --trace)
Rakefile:Line 7
Bundler.require
/usr/local/Cellar/ruby/2.7.1_2/lib/ruby/gems/2.7.0/gems/ProMotion-3.0.0/lib/ProMotion.rb: Line 9
insert_point = app.files.find_index { |file| file =~ /^(?:./)?app// } || 0

Reply from Eamon Webster:

BigDecimal.new was deprecated in ruby 2.6 and removed from ruby 2.7