[react-router-config] Fix error when "strictFunctionTypes" is on (#30460)

types/react-router-config/index.d.ts

@@ -1,7 +1,8 @@
-// Type definitions for react-router-config 1.0
+// Type definitions for react-router-config 1.1
 // Project: https://github.com/ReactTraining/react-router/tree/master/packages/react-router-config
 // Definitions by: François Nguyen <https://github.com/lith-light-g>
 //                 John Reilly <https://github.com/johnnyreilly>
+//                 Phoenix He <https://github.com/NullMDR>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -15,7 +16,7 @@ export interface RouteConfigComponentProps<Params extends { [K in keyof Params]?
 
 export interface RouteConfig {
     location?: Location;
-    component?: React.ComponentType<RouteConfigComponentProps<any> | {}>;
+    component?: React.ComponentType<RouteConfigComponentProps<any>> | React.ComponentType;
     path?: string;
     exact?: boolean;
     strict?: boolean;

types/react-router-config/tsconfig.json

@@ -8,7 +8,7 @@
         "noImplicitAny": true,
         "noImplicitThis": true,
         "strictNullChecks": true,
-        "strictFunctionTypes": false,
+        "strictFunctionTypes": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"