Better support for typedef @property

[mramato]

Given the following JSDoc

/**
 * @typedef {Object} BillboardGraphics.ConstructorOptions
 *
 * Initialization options for the BillboardGraphics constructor
 *
 * @property {Property | boolean} [show=true] A boolean Property specifying the visibility of the billboard.
 */

tsd-jsdoc was producing the following TS code

/**
 * Initialization options for the BillboardGraphics constructor
 * @property [show = true] - A boolean Property specifying the visibility of the billboard.
 */
type ConstructorOptions = {
    show?: Property | boolean;
};

@property is not valid TS markup and the actual property, show, does not include its description or default value.

After this change the same JSDoc markup produces much nicer code that handles both of these:

/**
 * Initialization options for the BillboardGraphics constructor
 */
type ConstructorOptions = {
    /**
     * A boolean property specifying the visibility of the billboard.
     * @defaultValue true
     */
    show?: Property | boolean;
};

I updated the tests, to match the new output and manually verified its what I would expect.

[mramato]

Thanks @englercj, I accepted your changes so I think this is ready.

[mramato]

Thanks @englercj! Any idea when tsd-jsdoc will get an updated npm release?

[mramato]

@englercj Are there any plans to do a new release anytime soon? I would like to make use of this PR and I didn't want to fork/publish to a different package just to use it.

I know you are busy and I'm still a complete stranger, but long term I have no problem helping out with maintaining this repository once I earn your trust, since CesiumJS is not dependent on it. Thanks!

[englercj]

There are some bugs and regressions that came up recently. I'm waiting for those to get fixed first.