README.md in repeatable-0.6.0 vs README.md in repeatable-1.0.0

@@ -1,10 +1,10 @@
 # Repeatable
 
-[![Build Status](https://img.shields.io/travis/molawson/repeatable.svg)](https://travis-ci.org/molawson/repeatable)
-[![Code Climate](https://img.shields.io/codeclimate/github/molawson/repeatable.svg)](https://codeclimate.com/github/molawson/repeatable)
-[![Code Climate Coverage](https://img.shields.io/codeclimate/coverage/github/molawson/repeatable.svg)](https://codeclimate.com/github/molawson/repeatable)
+[![Build Status](https://travis-ci.org/molawson/repeatable.svg?branch=main)](https://travis-ci.org/molawson/repeatable)
+[![Maintainability](https://api.codeclimate.com/v1/badges/73707efd5eeffd364c0d/maintainability)](https://codeclimate.com/github/molawson/repeatable/maintainability)
+[![Test Coverage](https://api.codeclimate.com/v1/badges/73707efd5eeffd364c0d/test_coverage)](https://codeclimate.com/github/molawson/repeatable/test_coverage)
 
 Ruby implementation of Martin Fowler's [Recurring Events for Calendars](http://martinfowler.com/apsupp/recurring.pdf) paper.
 
 ## Installation
 
@@ -22,11 +22,11 @@
 
     $ gem install repeatable
 
 ## Requirements
 
-Because this gem relies heavily on required keyword arguments, especially to make dumping and parsing of schedules simpler, this code will only work on **Ruby 2.1** and higher.
+Because this gem relies heavily on required keyword arguments, especially to make dumping and parsing of schedules simpler, this code will only work on **Ruby 2.2** and higher.
 
 ## Usage
 
 ### Building a Schedule
 
@@ -104,11 +104,11 @@
 # The 13th of every month
 { day_in_month: { day: 13 } }
 Repeatable::Expression::DayInMonth.new(day: 13)
 
 # The last day of every month
-{ day_in_month: { day: :last } }
-Repeatable::Expression::DayInMonth.new(day: :last)
+{ day_in_month: { day: -1 } }
+Repeatable::Expression::DayInMonth.new(day: -1)
 
 # All days in October
 { range_in_year: { start_month: 10 } }
 Repeatable::Expression::RangeInYear.new(start_month: 10)