chore(travis): Removing Lua5.3 test for the moment
chore(travis): Removing Lua5.3 test for the moment

Sailor has no compatibility with Lua 5.3 yet, but this is known and it is specified in the rockspec.

felipedaragon/sailor,mpeterv/sailor,mpeterv/sailor,Etiene/sailor,sailorproject/sailor,Etiene/sailor,felipedaragon/sailor