Allow optional parameters in components

[watzon]

Currently any needs parameter that gets included in a Component makes that a required parameter when using mount. It would be nice if there was either

• a wants macro that defines an optional parameter
• the ability to have it determine that any nillable needs parameter is optional

Example

needs user : User?

# or

wants user : User

[paulcsmith]

I think needs user : User? is good so we don't have to introduce a new concept. This kind of matches the behavior of getter user : User? where the default is nil even though you don't need to specify it. Thank you for opening this!

[watzon]

No problem :)