[Ruby 2.7] Stops using &Proc.new for block forwarding.

[olleolleolle]

Description

In order to be Ruby 2.7 warning-free, back-port 5ace0ea

Additional Notes

Faraday::Response::RaiseError
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 500 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for other 4xx responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 400 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ConnectionFailed for 407 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 401 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 409 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises no exception for 200 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 403 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::NilStatusError for nil status in response
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ResourceNotFound for 404 responses
/Users/olle/opensource/faraday/lib/faraday.rb:68: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/rack_builder.rb:55: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
  raises Faraday::ClientError for 422 responses

[olleolleolle]

Update: Found and fixed another:

/Users/olle/opensource/faraday/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead
/Users/olle/opensource/faraday/lib/faraday/options.rb:166: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead

[technoweenie]

Nice catch!

/cc #1080