fix: optional types

Author: pedronauck

src/index.tsx

@@ -41,7 +41,7 @@ export type MapperValue<RP, P> = ReactElement<any> | MapperComponent<RP, P>
 
 export type Mapper<RP, P> = Record<keyof RP, MapperValue<RP, P>>
 
-export function adopt<RP, P = {}>(mapper: Mapper<RP, P>): RPC<RP, P> {
+export function adopt<RP = any, P = {}>(mapper: Mapper<RP, P>): RPC<RP, P> {
   if (!values(mapper).some(isValidRenderProp)) {
     throw new Error(
       'The render props object mapper just accept valid elements as value'