fix: JsonBone validate object and list too

[ArneGudermann]

This PR fix the Bug that only str is validated by the JsonBone.

Example :

testjson = JsonBone(schema={
		"type": "object",
		"properties": {
			"price": {"type": "number"},
			"name": {"type": "string"},
		},
	})

print(skel.setBoneValue("testjson",{"name" : "Eggs", "price" : "invalid"}))
print(skel["testjson"])

True
{'name': 'Eggs', 'price': 'invalid'}

---

print(skel.setBoneValue("testjson",json.dumps({"name" : "Eggs", "price" : "invalid"})))
print(skel["testjson"])

False
{'name': 'Eggs', 'price': 1}