fix: Update allowable character limits and number of attributes for GA360 (#24)

Author: jshin-tse

mParticle-Google-Analytics-Firebase-GA4/MPKitFirebaseGA4Analytics.m

@@ -42,12 +42,13 @@ @implementation MPKitFirebaseGA4Analytics
 static NSString *const instanceIdIntegrationKey = @"app_instance_id";
 static NSString *const invalidFirebaseKey = @"invalid_ga4_key";
 
+// Following limits are based off Google Analytics 360 limits, docs here "https://support.google.com/analytics/answer/11202874?sjid=14644072134282618832-NA#limits"
 const NSInteger FIR_MAX_CHARACTERS_EVENT_NAME = 40;
 const NSInteger FIR_MAX_CHARACTERS_IDENTITY_NAME = 24;
-const NSInteger FIR_MAX_CHARACTERS_EVENT_ATTR_VALUE = 100;
+const NSInteger FIR_MAX_CHARACTERS_EVENT_ATTR_VALUE = 500;
 const NSInteger FIR_MAX_CHARACTERS_IDENTITY_ATTR_VALUE = 36;
-const NSInteger FIR_MAX_EVENT_PARAMETERS_PROPERTIES = 25;
-const NSInteger FIR_MAX_ITEM_PARAMETERS = 10;
+const NSInteger FIR_MAX_EVENT_PARAMETERS_PROPERTIES = 100;
+const NSInteger FIR_MAX_ITEM_PARAMETERS = 25;
 
 #pragma mark Static Methods