Replace deprecated SFC with FunctionComponent (#6746)

Author: Andrew Luca

packages/react-scripts/lib/react-app.d.ts

@@ -42,7 +42,7 @@ declare module '*.webp' {
 declare module '*.svg' {
   import * as React from 'react';
 
-  export const ReactComponent: React.SFC<React.SVGProps<SVGSVGElement>>;
+  export const ReactComponent: React.FunctionComponent<React.SVGProps<SVGSVGElement>>;
 
   const src: string;
   export default src;