LMap: wrong type of center attribute

At  https://github.com/vue-leaflet/vue-leaflet/blob/db34dff79cc62bc6fa51357e953e9bcf55725c94/src/components/LMap.vue#L53
I think the correct attribute type should be 'L.LatLngExpression` instead of `L.PointExpressione`

I receive always errors, that `lng` is not found