unknown-options-as-args doesn't work properly when a property has a number at the end. ```js require('yargs-parser')(['--str', '--num1'], { alias:{ 'num': ['n'] }, configuration: { 'unknown-options-as-args': true, } }); ``` Actual output ```js Object {_: ["--str"], num1: true} ``` Expected Output ```js Object {_: ["--str", "--num1"]} ``` yargs-parser version: 16.1.0