fix(fscomponents): Format review rating number output

In the review summary, a numerical rating is shown. Previously, it just displayed the raw numbers
rather than applying any formatting (eg. 4.6254592 / 5). This adds formatting that restricts it to a
single decimal place (eg. 4.6 / 5).

packages/fscomponents/src/components/ReviewsSummary.tsx

@@ -46,8 +46,9 @@ export class ReviewsSummary extends Component<ReviewsSummaryProps> {
       reviewIndicatorRowStyle,
       reviewIndicatorTitleText,
       reviewIndicatorTitleTextStyle
-     } = this.props;
+    } = this.props;
 
+    const numberFormatting = { maximumFractionDigits: 1 };
     const reviewIndicatorCopy = reviewIndicatorSubtitle ? reviewIndicatorSubtitle :
                     'based on ' + count + ' reviews';
 
@@ -58,7 +59,9 @@ export class ReviewsSummary extends Component<ReviewsSummaryProps> {
             <Text style={reviewIndicatorTitleTextStyle}>{reviewIndicatorTitleText}</Text>
           )}
           <ReviewIndicator value={value} {...reviewIndicatorProps} />
-          <Text style={[S.averageStyle, averageStyle]}>{value} / {base}</Text>
+          <Text style={[S.averageStyle, averageStyle]}>
+            {FSI18n.number(value, numberFormatting)} / {FSI18n.number(base, numberFormatting)}
+          </Text>
         </View>
         {!hideReviewIndicatorSubtitle && (
           <View style={[S.row, rowStyle]}>