Move test-utils to devDeps

Signed-off-by: Adam Harvey <adaharve@cisco.com>

packages/create-app/templates/default-app/packages/app/package.json.hbs

@@ -22,7 +22,6 @@
     "@backstage/plugin-tech-radar": "^{{version '@backstage/plugin-tech-radar'}}",
     "@backstage/plugin-techdocs": "^{{version '@backstage/plugin-techdocs'}}",
     "@backstage/plugin-user-settings": "^{{version '@backstage/plugin-user-settings'}}",
-    "@backstage/test-utils": "^{{version '@backstage/test-utils'}}",
     "@backstage/theme": "^{{version '@backstage/theme'}}",
     "@material-ui/core": "^4.12.2",
     "@material-ui/icons": "^4.9.1",
@@ -34,6 +33,7 @@
     "react-use": "^15.3.3"
   },
   "devDependencies": {
+    "@backstage/test-utils": "^{{version '@backstage/test-utils'}}",
     "@testing-library/jest-dom": "^5.10.1",
     "@testing-library/react": "^10.4.1",
     "@testing-library/user-event": "^12.0.7",