PUT / DELETE requests don't do crumb validation

It's very common in other frameworks to do REST routes as such:

```
(request: Request, h: ResponseToolkit): symbol => {
if (request.method === 'post' && request.url.searchParams.has('_method')) {
const override = request.url.searchParams.get('_method');
request.setMethod(override);
}

return h.continue;
};
```

These are some example routes:

```
{
path: '/articles',
method: 'POST',
options: {
validate: {
payload: Joi.object({
name: Joi.string(),
});
},
},
handler: store,
},
{
path: '/articles/{slug}',
method: 'PUT',
options: {
validate: {
payload: Joi.object({
name: Joi.string(),
});
},
},
handler: save,
},
```

POST will succeed, PUT will fail because

```
errors: {
"crumb": "\"crumb\" is not allowed"
}
```