added RCT EXPORT heart rate samples method

RCTAppleHealthKit/RCTAppleHealthKit.m

@@ -14,6 +14,7 @@
 #import "RCTAppleHealthKit+Methods_Body.h"
 #import "RCTAppleHealthKit+Methods_Fitness.h"
 #import "RCTAppleHealthKit+Methods_Characteristic.h"
+#import "RCTAppleHealthKit+Methods_Vitals.h"
 
 @implementation RCTAppleHealthKit
 
@@ -134,6 +135,11 @@ RCT_EXPORT_METHOD(getFlightsClimbed:(NSDictionary *)input callback:(RCTResponseS
     [self fitness_getFlightsClimbedOnDay:input callback:callback];
 }
 
+RCT_EXPORT_METHOD(getHeartRateSamples:(NSDictionary *)input callback:(RCTResponseSenderBlock)callback)
+{
+    [self vitals_getHeartRateSamples:input callback:callback];
+}
+
 
 
 RCT_EXPORT_METHOD(getInfo:(NSDictionary *)input callback:(RCTResponseSenderBlock)callback)