Merge remote-tracking branch 'origin/master'

README.md

@@ -81,7 +81,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.1.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

ios/RNSyanImagePicker.m

@@ -341,6 +341,11 @@ RCT_EXPORT_METHOD(removeAllPhoto) {
     }
 }
 
++ (BOOL)requiresMainQueueSetup
+{
+   return YES;
+}
+
 - (BOOL)createDir {
     NSString * path = [NSString stringWithFormat:@"%@ImageCaches", NSTemporaryDirectory()];;
     NSFileManager *fileManager = [NSFileManager defaultManager];