GObject.ParamSpec.*'s blurb and nick should be nullable

[vixalien]

For example, this won't work

GObject.ParamSpec.string(
        "title",
        null,
        null,
        GObject.ParamFlags.READWRITE,
        "",
      )

because the blurb and nick are null.

[JumpLink]

@vixalien I can't find anything about this in the documentation. It may work with null, but is that how it is specified? Perhaps it would be better to define the values or at least use an empty string instead?

I'm also considering reversing the change to the nullable enums; it may work, but it doesn't makes the code better or more readable and could potentially lead to side effects or break something in the future if it is not actually intended that null can be passed. Possibly these are just bugs in the JavaScript examples that you found thanks to TypeScript?

[vixalien]

Yeah actually I think you should reverse the change to allow null enumerations.

For the GObject.ParamSpec.string, you can see that the similar method GObject.param_spec_string does allow those to be null

[JumpLink]

Okay thanks, then let's do it like this