Error in parsing strings when using object as interpreter

[jcubic]

Issue summary

jQuery Terminal throw error on valid strings when using object as interpreter

Expected behavior

strings are parsed correctly

Actual behavior

invalid JSON exception is thrown

Steps to reproduce

create basic terminal with command as object property function:

var term = $('body').terminal({
  test: (...args) => {
    console.log(args);
    }
  }, {checkArity: false});

Type: test "{\"wrap\": true}" or test '{"wrap": true}'

it throw: Error: Unexpected token w in JSON at position 3