Add types for properties and arguments

This is likely to cause breaking changes so it should be part of the 3.0 release.

ptmkenny → closed merge request !22

Tests are failing with errors like these:

        "data": "[Type Error] Attribute \"factory\" of @JsonRpcParameterDefinition declared on class Drupal\\jsonrpc_core\\Plugin\\jsonrpc\\Method\\ListPermissions expects a(n) string|null, but got string."

ptmkenny → closed merge request !17

Automatically closed - issue fixed for 2 weeks with no activity.