Add textTransform style prop (#27210)

types/react-native/index.d.ts

@@ -766,6 +766,7 @@ export interface TextStyleIOS extends ViewStyle {
     letterSpacing?: number;
     textDecorationColor?: string;
     textDecorationStyle?: "solid" | "double" | "dotted" | "dashed";
+    textTransform?: "none" | "capitalize" | "uppercase" | "lowercase";
     writingDirection?: "auto" | "ltr" | "rtl";
 }
 

types/react-native/test/index.tsx

@@ -676,6 +676,10 @@ class StylePropsTest extends React.PureComponent {
                     // tintColor="green"
                     // width={200}
                 />
+
+                <Text style={{ /* iOs only */ textTransform: 'capitalize'  }}>
+                    Text
+                </Text>
             </View>
         );
     }