fix: bumping frontend-base version to 4.0.0 (#21)

Author: davidjoy

package-lock.json

@@ -39,7 +39,7 @@
     "@babel/preset-react": "7.0.0",
     "@edx/frontend-analytics": "3.0.0",
     "@edx/frontend-auth": "7.0.1",
-    "@edx/frontend-base": "3.0.0",
+    "@edx/frontend-base": "4.0.0",
     "@edx/frontend-i18n": "3.0.3",
     "@edx/frontend-logging": "3.0.1",
     "@edx/paragon": "7.1.4",
@@ -71,7 +71,7 @@
   },
   "peerDependencies": {
     "@edx/frontend-analytics": "^3.0.0",
-    "@edx/frontend-base": "^3.0.0",
+    "@edx/frontend-base": "^4.0.0",
     "@edx/frontend-i18n": "^3.0.3",
     "prop-types": "^15.7.2",
     "react": "^16.9.0"

package.json

@@ -11,7 +11,7 @@ import LogoSVG from './logo.svg';
 
 import messages from './SiteHeader.messages';
 
-App.requireConfig([
+App.ensureConfig([
   'LMS_BASE_URL',
   'LOGOUT_URL',
   'LOGIN_URL',