Add default value for houseNumber.

[lukas-jansen]

Changed street parameter naming to match sendcloud API naming
Closes #23

[villermen]

@lukas-jansen Thanks for the contribution! I've looked through it and played around with it for a bit. I'm going to add some changes to address some concerns before this can be merged:

• Street can no longer be obtained separately on obtained parcels. I can imagine that's still a valid use case for some.
• It's not clear that leaving house number empty will auto-parse it (it will, I verified). null is not accepted by the API however. I think leaving out the nullable parameter entirely when it's null is easier to interpret.
• Address and house number can be supplied together, working additively. I don't think that's a concern to fix, but I can add a docblock to make that clear.

[lukas-jansen]

@villermen The street and housenumber can still be obtained separately https://github.com/Webador/sendcloud/pull/24/files#diff-0776c3ed4485bbdfe0e342af8a73172d8fe7c73ec79d485a529929c425a268b3L12-L13 Sendcloud will still return the address divided parameters with the street and housenumber it parsed from the address

[villermen]

@lukas-jansen You're right! I meant to say I want to support both situations without having to do add or split the addresses ourselves. Like so: 1bb4910#diff-0776c3ed4485bbdfe0e342af8a73172d8fe7c73ec79d485a529929c425a268b3R7-R29

Question on the side: I know the API calls it "address", but we already call our model that way. Do you reckon calling the property "addressLine1" would make things more clear or more confusing?

[lukas-jansen]

In our case (Craft CMS) is using this package for addressing, what follows the https://github.com/commerceguys/addressing
There it's also called addressLine1 so in that way it would be clear

[villermen]

@lukas-jansen Thanks for the solution and thinking with me on this! I'll push a major release that includes these changes shortly.