Add progress type for ProgressBarProps (#996)

Author: arryanggaputra

typings/components/ProgressBar.d.ts

@@ -1,10 +1,10 @@
-
 import {StyleProp, ViewStyle} from 'react-native';
 import {BaseComponent} from '../commons';
 import {ColorValue} from '../style/colors';
 
 export interface ProgressBarProps {
   height?: number;
+  progress?: string;
   backgroundColor?: ColorValue;
   progressBackgroundColor?: ColorValue;
   containerStyle?: StyleProp<ViewStyle>;