fix: React Native Codegen issue with version 0.84

`NativeMParticle.ts (line 6) uses TSArrayType shorthand (string[]) which is unsupported by the React Native codegen`
Removed the null type in the map
- In RNMParticle.mm, added sanitization for user attributes to exclude null values before returning them in the callback.
- Updated TypeScript definitions to reflect the changes in callback result types.

Author: thomson-t

android/src/main/java/com/mparticle/react/MParticleModule.kt

@@ -179,7 +179,7 @@ class MParticleModule(
                 },
             )
         } else {
-            callback.invoke()
+            callback.invoke(null, WritableNativeMap())
         }
     }
 

ios/RNMParticle/RNMParticle.mm

@@ -163,7 +163,14 @@ + (void)load {
 {
     MParticleUser *selectedUser = [[MParticleUser alloc] init];
     selectedUser.userId = [NSNumber numberWithLong:mpid.longLongValue];
-    callback(@[[NSNull null], [selectedUser userAttributes]]);
+    NSDictionary *attributes = [selectedUser userAttributes] ?: @{};
+    NSMutableDictionary *sanitizedAttributes = [[NSMutableDictionary alloc] initWithCapacity:attributes.count];
+    [attributes enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
+        if (obj != nil && obj != [NSNull null]) {
+            sanitizedAttributes[key] = obj;
+        }
+    }];
+    callback(@[[NSNull null], sanitizedAttributes]);
 }
 
 RCT_EXPORT_METHOD(setUserTag:(NSString *)mpid tag:(NSString *)tag)

js/codegenSpecs/NativeMParticle.ts

@@ -3,7 +3,7 @@ import { TurboModuleRegistry } from 'react-native';
 
 export type CustomAttributes = { [key: string]: string | number | boolean };
 export type UserAttributes = {
-  [key: string]: string | string[] | number | boolean | null;
+  [key: string]: string | string[] | number | boolean;
 };
 export type UserIdentities = { [key: string]: string };
 
@@ -153,7 +153,7 @@ export interface Spec extends TurboModule {
     mpid: string,
     callback: (
       error: CallbackError | null,
-      result: UserAttributes | null
+      result: UserAttributes
     ) => void
   ): void;
   setUserTag(mpid: string, tag: string): void;