Setup and configure vcr gem

  * all tests have been record and passing

[#69826664]
Updated psych and libyaml gems
Moved vcr gem configuration to spec_helper.rb
Implement caching

  * Installed and configured 'vcr' gem
  * Installed and configured Redis

[#69826664]
Added rack-cache gem per heroku
Setting up redis for heroku
Setting up redis for heroku attempt 2
Setting up redis for heroku attempt 3
Setting up redis for heroku attempt 4
Setting up redis for heroku attempt 5
Setting up redis for heroku attempt 6
Setting up redis for heroku attempt 7
Setting up redis for heroku attempt 8
Setting up redis for heroku attempt 9
Setting up redis for heroku attempt 10
Setting up redis for heroku attempt 11
Setting up redis for heroku attempt 12
Setting up redis for heroku attempt 13
Setting up redis for heroku attempt 14
Implement caching

[#69826664]