Update eslint to error with vue-no-new-non-primitive rule

- We choose to allow this for some props like "class", "style", and
  VueRouter's "to". Also v-bind which expects an object and is
  matched by `^$`.
- There's some trivial fixes possible, but to keep this review trivial
  we opt for just adding the eslint-disable and eslint-enable for
  existing violations