chore(): update to stencil 2, resolve npm7 build issues (#22396)

* feat(stencil): update to stencil 2.1.2

- Updates package entry points, index.js and index.cjs.js
- Fix treeshaking unused and remove side effect globals

* chore: add typescript 4.0.5 to devDeps

* npm7 fixes

Co-authored-by: Adam Bradley <adamdbradley@users.noreply.github.com>

angular/src/directives/proxies-list.txt

@@ -1,5 +1,5 @@
 
-import * as d from './proxies';
+import type * as d from './proxies';
 
 export const DIRECTIVES = [
   d.IonApp,