fix bug when function like as 'f(id = 1)'

[Rwing]

function f(id = 1){
    id = 'a,b';
}

getParameterNames(f); // => [ 'id', 'b\';' ]

[Rwing]

@goatslacker Hi, please help me to review it~

[CaptEmulation]

Can you write a unit test to demonstrate this failure? Bonus points if you can also get this function to parse: ( a = 1 , b=2, c = (err, data)=>{}) => {}

[CaptEmulation]

Just FYI that CaptEmulation/get-parameter-names handles this case. npm i @captemulation/get-parameter-names