Fix includes for react, Update documentation

Author: HazAT

docs/index.rst

@@ -169,7 +169,11 @@ crash handler in your `AppDelegate.m` after the root view was created:
 
 .. sourcecode:: objc
 
-    #import <React/RNSentry.h>
+    #if __has_include(<React/RNSentry.h>)
+    #import <React/RNSentry.h> // This is used for versions of react >= 0.40
+    #else
+    #import "RNSentry.h" // This is used for versions of react < 0.40
+    #endif
 
     /* ... */
     [RNSentry installWithRootView:rootView];

examples/ReactNativeExample/ios/ReactNativeExample/AppDelegate.m

@@ -12,6 +12,12 @@
 #import <React/RCTBundleURLProvider.h>
 #import <React/RCTRootView.h>
 #import <React/RNSentry.h>
+#if __has_include(<React/RNSentry.h>)
+#import <React/RNSentry.h> // This is used for versions of react >= 0.40
+#else
+#import "RNSentry.h" // This is used for versions of react < 0.40
+#endif
+
 
 @interface AppDelegate()
 

ios/RNSentry.m

@@ -1,6 +1,11 @@
 #import "RNSentry.h"
 #import "RSSwizzle.h"
+#if __has_include(<React/RCTConvert.h>)
 #import <React/RCTConvert.h>
+#else
+#import "RCTConvert.h"
+#endif
+
 
 @import Sentry;