fix ember-try for >= 5.x releases

- add `@ember/string` to `devDependencies` for ember-resolver and other
dependencies
- Update `ember-resolver`
- Remove `ember-export-application-global` as we don't need it and it
causes other build issues

package.json

@@ -77,6 +77,7 @@
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
+    "@ember/string": "^3.1.1",
     "@ember/test-helpers": "^2.9.3",
     "@embroider/test-setup": "^2.0.2",
     "@glimmer/component": "^1.0.4",
@@ -99,7 +100,6 @@
     "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-qunit": "^5.1.5",
     "ember-resolver": "^8.0.3",