FIX |ENG-2998| Remove two incorrect Mexican Bank Holidays

Makefile

@@ -1,9 +1,9 @@
-default: validate
+default: test
 
 validate:
 	bundle exec ruby lib/validation/run.rb
 
-test:
+test: validate
 	bundle exec rspec
 
 .PHONY: validate,test

SYNTAX.md

@@ -103,7 +103,7 @@ Then the holiday will be returned. This is especially useful for holidays like "
 
 ### Year ranges
 
-Certain holidays in various countries are only in effect during specific year ranges. For example, a new holiday might come into effect that is only valid after a specific year (say, 2017).
+Certain holidays in various countries are only in effect during specific year ranges. For example, a new holiday might come into effect that is only valid after a specific year (say, 2017). After is inclusive, if you put after: 2017 it will apply on 2017 and after.
 
 To address this we have the ability to specify these 'year ranges' in the definition. The gem will then only return a match on a date that adheres to these rules.