Retail: Max level constant is set to 80

Please include as much of the following information as possible to help me fix the bug:

## Brief Description of Bug

Max level in midnight is 90. It's still set to 80 in addon constants limiting the item results. 

Constants.lua 

` MaxLevel = 80,`
to 
` MaxLevel = 90,` 

## Steps to Reproduce

N/A

## Loaded Addons

Doesn't matter

## Back Trace (LUA Error Output)

N/A 