Merge pull request #1 from yyoshiki41/fix/flow-annotation

Fix flow annotation in examples

Author: moqada

examples/PasscodeAuthExample/Libraries/PasscodeAuth/PasscodeAuth.ios.js

@@ -28,7 +28,7 @@ var Passcode = {
     });
   },
 
-  authenticate(reason) {
+  authenticate(reason: string) {
     var authReason;
 
     // Set auth reason