write tests for new Minutizer class that will parse duration in minutes from strings like 'It lasted 2 hours and 30 mintues'
Add a Minutizer class with a #minutize method that should take in text as a string and return the duration found in that text as an integer/fixnum.

ex: Minutizer.new.minutize("It took me a 5 hours to write my tests") => 300
ex2: Minutizer.new.minituze("I spent 321 seconds contemplating this commit message") => 5.35
require chronic/minutizer in chronic.rb and add Chronic.minutize utilizing a new instance of Minutizer