CONTRIBUTING.md in polyfill-1.0.1 vs CONTRIBUTING.md in polyfill-1.1.0

- old
+ new

@@ -7,10 +7,11 @@
 
 ### Code
 
 A list of changes can be found at:
 
- * https://raw.githubusercontent.com/ruby/ruby/v2_4_1/NEWS
+ * https://raw.githubusercontent.com/ruby/ruby/v2_5_0/NEWS
+ * https://raw.githubusercontent.com/ruby/ruby/v2_4_2/NEWS
  * https://raw.githubusercontent.com/ruby/ruby/v2_3_4/NEWS
  * https://raw.githubusercontent.com/ruby/ruby/v2_2_7/NEWS
 
 Specific changes can be found by going to the [Ruby bug/feature tracker].
 