fixed inputWeb to be a TextStyle, not ViewStyle (lawnstarter#365)

Author: khevamann

index.d.ts

@@ -37,7 +37,7 @@ export interface PickerStyle {
     inputAndroidContainer?: ViewStyle;
     inputIOS?: TextStyle;
     inputIOSContainer?: ViewStyle;
-    inputWeb?: ViewStyle;
+    inputWeb?: TextStyle;
     modalViewBottom?: ViewStyle;
     modalViewMiddle?: ViewStyle;
     modalViewTop?: ViewStyle;