Migrate to Vue 3.0 #230

- Migrate from "Vue 2.X" to "Vue 3.X"
- Migrate from "Vue Test Utils v1" to "Vue Test Utils v2"

Changes in detail:

- Change `inserted` to `mounted`.
- Change `::v-deep` to `:deep`.
- Change to Vue 3.0 `v-modal` syntax.
- Remove old Vue 2.0 transition name, keep the ones for Vue 3.0.
- Use new global mounting API `createApp`.
- Change `destroy` to `unmount`.
- Bootstrapping:
  - Move `provide`s for global dependencies to a bootsrapper from
    `App.vue`.
  - Remove `productionTip` setting (not in Vue 3).
  - Change `IVueBootstrapper` for simplicity and Vue 3 compatible API.
  - Add missing tests.
- Remove `.text` access on `VNode` as it's now internal API of Vue.
- Import `CSSProperties` from `vue` instead of `jsx` package.
- Shims:
  - Remove unused `shims-tsx.d.ts`.
  - Remove `shims-vue.d.ts` that's missing in quickstart template.
- Unit tests:
  - Remove old typing workaround for mounting components.
  - Rename `propsData` to `props`.
  - Remove unneeded `any` cast workarounds.
  - Move stubs and `provide`s under `global` object.

Other changes:

- Add `dmg-license` dependency explicitly due to failing electron builds
  on macOS (electron-userland/electron-builder#6520,
  electron-userland/electron-builder#6489). This was a side-effect of
  updating dependencies for this commit.

tests/unit/presentation/components/Shared/Modal/ModalOverlay.spec.ts

@@ -99,7 +99,7 @@ describe('ModalOverlay.vue', () => {
 });
 
 function mountComponent(options?: { readonly showProperty?: boolean }) {
-  return shallowMount(ModalOverlay as unknown, {
-    propsData: options?.showProperty !== undefined ? { show: options?.showProperty } : undefined,
+  return shallowMount(ModalOverlay, {
+    props: options?.showProperty !== undefined ? { show: options?.showProperty } : undefined,
   });
 }