Tell us about your environment

• ESLint version: 7.x.x
• eslint-plugin-vue version: 7.20.0
• Node version: 14.x.x

The problem you want to solve.
When mapping props with Vuex's mapState & mapGetters and methods with mapMutations & mapActions, vue/no-unused-properties doesn't report those props/methods if they're unused. Also, vue/no-undef-properties reports those props as undefined if they're used.

Your take on the correct solution to problem.
Considering Vuex is a core part of the Vue ecosystem & is widely used, the aforementioned rules should take mapped props & methods into account.

Additional context