Missing RouterLinkStub in some component tests

[Vue warn]: Unknown custom element: <router-link> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

found in

---> <HeaderActions> at vue/HeaderActions.vue
       <Root>
[Vue warn]: Unknown custom element: <router-link> - did you register the component correctly? For recursive components, make sure to provide the "name" option.

found in

---> <Member> at vue/Memberships/Member.vue
       <Root>

These warnings appear repeatedly for the unit tests of Member and HeaderActions and can probably be resolved just by adding vue-test-utils' RouterLinkStub.