Add secondary user attribute (#76)

index.d.ts

@@ -184,6 +184,13 @@ declare module 'launchdarkly-react-native-client-sdk' {
          */
         key: string;
 
+        /**
+         * The secondary key for the user. See the 
+         * [documentation](https://docs.launchdarkly.com/home/managing-flags/targeting-users#percentage-rollout-logic) 
+         * for more information on it's use for percentage rollout bucketing.
+         */
+        secondary?: string;
+
         /**
          * The user's name.
          *

ios/LaunchdarklyReactNativeClient.swift

@@ -152,6 +152,10 @@ class LaunchdarklyReactNativeClient: RCTEventEmitter {
     private func userBuild(userDict: NSDictionary) -> LDUser? {
         var user = LDUser()
         user.key = userDict["key"] as! String
+
+        if userDict["secondary"] != nil {
+            user.secondary = userDict["secondary"] as? String
+        }
 
         if userDict["name"] != nil {
             user.name = userDict["name"] as? String

test-types.ts

@@ -50,6 +50,7 @@ async function tests() {
     const userWithKeyOnly: LDUser = { key: 'user' };
     const user: LDUser = {
         key: 'user',
+        secondary: 'user.secondary',
         name: 'name',
         firstName: 'first',
         lastName: 'last',
@@ -65,7 +66,7 @@ async function tests() {
     const timeoutClient: LDClient = new LDClient();
 
     const configure: null = await client.configure(configWithAllOptions, user);
-    const configureWithTimeout: null = await timeoutClient.configure(configWithAllOptions, user, 10);
+    const configureWithTimeout: null = await timeoutClient.configure(configWithAllOptions, userWithKeyOnly, 10);
     const identify: null = await client.identify(user);
 
     const boolFlagValue: boolean = await client.boolVariation('key', false);