Fix minimum native iOS SDK requirement

Author: radko93

ios/RNBranch.m

@@ -29,7 +29,7 @@
 static NSString * const RNBranchErrorDomain = @"RNBranchErrorDomain";
 static NSInteger const RNBranchUniversalObjectNotFoundError = 1;
 
-static NSString * const REQUIRED_BRANCH_SDK = @"0.28.1";
+static NSString * const REQUIRED_BRANCH_SDK = @"0.29.0";
 
 #pragma mark - Private RNBranch declarations