trim unused packages (#157)

* build: update `caniuse-lite`

Following this warning in the terminal:

> Browserslist: caniuse-lite is outdated. Please run:
> npx browserslist@latest --update-db
>
> Why you should do it regularly:
> https://github.com/browserslist/browserslist#browsers-data-updating

* build: remove useless `@types` packages

* build: remove unused packages

* build: deduplicate packages

```
npx yarn-deduplicate && yarn
```

package.json

@@ -51,46 +51,27 @@
     "@ember/optional-features": "^2.0.0",
     "@ember/test-helpers": "^2.4.0",
     "@embroider/test-setup": "^0.47.0",
-    "@glimmer/component": "^1.0.3",
-    "@glimmer/tracking": "^1.0.3",
     "@types/ember-qunit": "^3.4.14",
     "@types/ember-resolver": "^5.0.10",
     "@types/ember__application": "^3.16.3",
-    "@types/ember__array": "^3.16.4",
-    "@types/ember__component": "^3.16.6",
-    "@types/ember__controller": "^3.16.6",
     "@types/ember__debug": "^3.16.5",
-    "@types/ember__engine": "^3.16.3",
-    "@types/ember__error": "^3.16.1",
     "@types/ember__object": "^3.12.5",
-    "@types/ember__polyfills": "^3.12.1",
-    "@types/ember__routing": "^3.16.15",
     "@types/ember__runloop": "^3.16.3",
     "@types/ember__service": "^3.16.1",
-    "@types/ember__string": "^3.16.3",
-    "@types/ember__template": "^3.16.1",
-    "@types/ember__test": "^3.16.1",
     "@types/ember__test-helpers": "^2.0.1",
-    "@types/ember__utils": "^3.16.2",
-    "@types/htmlbars-inline-precompile": "^1.0.1",
     "@types/qunit": "^2.11.2",
-    "@types/rsvp": "^4.0.4",
     "@typescript-eslint/eslint-plugin": "^4.30.0",
     "@typescript-eslint/parser": "^4.30.0",
     "babel-eslint": "^10.1.0",
-    "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^1.11.3",
     "ember-cli": "~3.24.0",
     "ember-cli-dependency-checker": "^3.2.0",
-    "ember-cli-inject-live-reload": "^2.1.0",
-    "ember-cli-sri": "^2.1.1",
     "ember-cli-terser": "^4.0.2",
     "ember-cli-typescript-blueprints": "^3.0.0",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.1",
     "ember-load-initializers": "^2.1.2",
     "ember-maybe-import-regenerator": "^1.0.0",
-    "ember-page-title": "^6.0.3",
     "ember-qunit": "^5.1.1",
     "ember-resolver": "^8.0.2",
     "ember-source": "~3.26.1",

tests/dummy/app/templates/application.hbs

@@ -1,5 +1,3 @@
-{{page-title "Dummy"}}
-
 <h2 id="title">Welcome to Ember</h2>
 
 {{outlet}}