Add missing status codes and rename enum members to PascalCase

Change-Id: Iab2893d75ac7cb797364a7a2e33a7140cc9d97db
diff --git a/common/src/index.ts b/common/src/index.ts
index e58fd49..41e19b3 100644
--- a/common/src/index.ts
+++ b/common/src/index.ts
@@ -19,4 +19,5 @@
 export * from './AccountDetails.js';
 export * from './Contact.js';
 export * from './Conversation.js';
+export * from './enums/http-status-code.js';
 export * from './util.js';