[v1.3.x] [Bug] Variables not properly declared

[Quantalabs]

Describe the bug Variables are not properly declared on line 63 of model.js.

https://github.com/epispot/EpiJS/blob/32c102c5a6d82c79b00740673efdceaff6556e76/EpiJS/model.js#L63-L64

Expected behavior When you run a command, perhaps:

model.get_data(20)

It returns an error:

$ node index.js
/home/user/project/node_modules/@epispot/epijs/EpiJS/model.js:63
key = this.key
         ^

ReferenceError: key is not defined

NPM

• NPM Version - 7.19.1
• Node.js Version - v16.4.2
• Operating System - Ubuntu (WSL)
• EpiJS Version - v1.3.1

Additional context Solution can be easily fixed with:

var key = this.key 
var newkey = key