gobbleArray() {
		this.index++;

		return {
			type: Jsep.ARRAY_EXP,
			elements: this.gobbleArguments(Jsep.CBRACK_CODE)
		};
	}
Responsible for parsing Array literals `[1, 2, 3]`
This function assumes that it needs to gobble the opening bracket
and then tries to gobble the expressions as arguments.
@returns {jsep.ArrayExpression}