Quoted empty strings are valid arguments.

[wolfmanx]

This resolves issue #6 by collecting arguments for quoted empty strings.

[TrySound]

Hi! Could you please write a test?

https://github.com/TrySound/args-tokenizer/blob/main/src/args-tokenizer.test.ts

[wolfmanx]

I wrote the test.

As you can see, it should not have been written before the unescaping was fixed though (#5).
Once it is fixed, the last two test cases will become invalid, since the double quoting case will result in an empty argument and the single quoting case will have the currently dropped backslash added.