test iOS 9.3 on sauce

Author: yyx990803

build/karma.sauce.config.js

@@ -60,7 +60,7 @@ var batches = [
     sl_ios_safari_9: {
       base: 'SauceLabs',
       browserName: 'iphone',
-      version: '9.2'
+      version: '9.3'
     },
     sl_android_4_2: {
       base: 'SauceLabs',