chore: 🤖 Update UI's to could use node v15

Update UI's engines in package.json to could use node v15. The change is
motivated for apple M1 chip. If you have an apple M1 chip you need to
use node v15 to avoid errors while building the UI.

addons/api/package.json

@@ -71,7 +71,7 @@
     "qunit-dom": "^1.6.0"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"

addons/auth/package.json

@@ -65,7 +65,7 @@
     "qunit-dom": "^1.6.0"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"

addons/core/package.json

@@ -80,7 +80,7 @@
     "qunit-dom": "^1.6.0"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"

addons/rose/package.json

@@ -87,7 +87,7 @@
     "sass-lint": "^1.13.1"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"

ui/admin/package.json

@@ -92,7 +92,7 @@
     "sinon": "^9.2.1"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"

ui/desktop/package.json

@@ -99,7 +99,7 @@
     "stylelint-config-sass-guidelines": "^7.1.0"
   },
   "engines": {
-    "node": ">=10 <=14"
+    "node": ">=10 <=15"
   },
   "ember": {
     "edition": "octane"