Changes Tiled Map properties value to an array instead of object

[likwidgames]

Please do not update the README or Change Log, we will do this when we merge your PR.

This PR (delete as applicable)

• Fixes a bug

Describe the changes below:

Tiled outputs Map properties as an array of objects, rather than a singular object.

[photonstorm]

Some versions of Tiled do, yes, but not all. So I cannot merge this as it'll break as many versions as it helps fix. This needs to be conditional and checked for in the parser.

Plus, you'll need to undo all of the eslint breaking modifications please (quotes, etc)

[photonstorm]

Thanks for originally submitting this PR, but we're tidying up and closing down things that won't be, or don't need merging for the Phaser 4 release.