feat: allow runtime configuration (#955)

Allows frontend-app-learning to be configured at
runtime using the LMS's new MFE Configuration API.

Part of openedx/frontend-wg#103

src/courseware/course/sequence/SequenceContent.test.jsx

@@ -14,7 +14,7 @@ describe('Sequence Content', () => {
       courseId: courseware.courseId,
       sequenceId: courseware.sequenceId,
       unitId: models.sequences[courseware.sequenceId].unitIds[0],
-      unitLoadedHandler: () => {},
+      unitLoadedHandler: () => { },
     };
   });
 

src/courseware/course/sequence/content-lock/messages.js

@@ -8,7 +8,7 @@ const messages = defineMessages({
   },
   'learn.contentLock.complete.prerequisite': {
     id: 'learn.contentLock.complete.prerequisite',
-    defaultMessage: "You must complete the prerequisite: '{prereqSectionName}' to access this content.",
+    defaultMessage: "You must complete the prerequisite: ''{prereqSectionName}'' to access this content.",
     description: 'Message shown to indicate which prerequisite the student must complete prior to accessing the locked content.  {prereqSectionName} is the name of the prerequisite.',
   },
   'learn.contentLock.goToSection': {