function with empty parameters for @plumier/reflect

Hello,

reflect is not working for function empty parameters

Test example

import reflect from '@plumier/reflect';

it('should return empty for a function with none parameters', () => {
    const fn = () => {
      return true;
    };

    // throws an exception here
    const metadata = reflect(fn);
    expect(metadata).toBeDefined();
  });

    TypeError: Cannot convert undefined or null to object
        at Function.getOwnPropertyNames (<anonymous>)

Thanks

[ktutnik]

I see, it uses regex and doesn’t require a valid javascript syntax. We was using regex in our earlier version and found its getting more issue most case.

I think I can mix between the current logic with regex to get a more robust result. Will give you an update about this.

[sebaplaza]

Not for now, i detected these cases running your fixes against production code.

Then i wrote the tests to reproduce the case.

Just for information: I was using this library (abandoned) before migrate to yours.

I found these cases where plumier is not working, but plumier is giving a lot more of metadata information than the others.