Bump Prettier to 1.16.4

Summary:
@public
This bumps Prettier to v1.16.4
Only format source files were updated.

Reviewed By: mjesun

Differential Revision: D14454893

fbshipit-source-id: 72f9872fe764a79dbf0d9fab9bebb1456b039f2f

RNTester/js/TextExample.android.js

@@ -477,9 +477,8 @@ class TextExample extends React.Component<{}> {
             app.
           </Text>
           <Text style={{marginTop: 10}}>
-            You can disable scaling for your Text component by passing {'"'}allowFontScaling={
-              '{'
-            }false{'}"'} prop.
+            You can disable scaling for your Text component by passing {'"'}
+            allowFontScaling={'{'}false{'}"'} prop.
           </Text>
           <Text allowFontScaling={false} style={{marginTop: 20, fontSize: 15}}>
             This text will not scale.{' '}
@@ -642,7 +641,6 @@ const styles = StyleSheet.create({
     alignSelf: 'center',
   },
 });
-
 exports.title = '<Text>';
 exports.description = 'Base component for rendering styled text.';
 exports.examples = [