fix build

Author: mansona

package.json

@@ -37,7 +37,7 @@
     "ember-cli-app-version": "^5.0.0",
     "ember-cli-babel": "^7.26.6",
     "ember-cli-dependency-checker": "^3.2.0",
-    "ember-cli-fastboot": "^3.2.0-beta.5",
+    "ember-cli-fastboot": "^4.1.5",
     "ember-cli-htmlbars": "^5.7.1",
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-netlify": "^0.4.1",
@@ -64,8 +64,9 @@
     "eslint-plugin-qunit": "^6.1.1",
     "loader.js": "^4.7.0",
     "markdownlint-cli": "^0.28.1",
+    "normalize.css": "^8.0.1",
     "npm-run-all": "^4.1.5",
-    "prember": "^2.0.0",
+    "prember": "^2.1.0",
     "prettier": "^2.3.2",
     "qunit": "^2.16.0",
     "qunit-dom": "^1.6.0",