fix: add explicit return types

The return type of `NumericFormat` and `PatternFormat` was being inferred as
`JSX.Element` which caused the following type error (typescript v5.7.3):

```
error TS2786: 'PatternFormat' cannot be used as a JSX component.
  Its type '<BaseType = InputAttributes>(props: PatternFormatProps<BaseType>) => Element' is not a valid JSX element type.
    Type '<BaseType = InputAttributes>(props: PatternFormatProps<BaseType>) => Element' is not assignable to type '(props: any) => ReactNode | Promise<ReactNode>'.
      Type 'Element' is not assignable to type 'ReactNode | Promise<ReactNode>'.
        Property 'children' is missing in type 'Element' but required in type 'ReactPortal'.
```

Instead of being inferred, explicitly add the return type of `React.ReactElement`
which represents a JSX element.

Author: justinbup

src/numeric_format.tsx

@@ -566,7 +566,7 @@ export function useNumericFormat<BaseType = InputAttributes>(
 
 export default function NumericFormat<BaseType = InputAttributes>(
   props: NumericFormatProps<BaseType>,
-) {
+): React.ReactElement {
   const numericFormatProps = useNumericFormat(props);
 
   return <NumberFormatBase {...numericFormatProps} />;

src/pattern_format.tsx

@@ -265,7 +265,7 @@ export function usePatternFormat<BaseType = InputAttributes>(
 
 export default function PatternFormat<BaseType = InputAttributes>(
   props: PatternFormatProps<BaseType>,
-) {
+): React.ReactElement {
   const patternFormatProps = usePatternFormat(props);
 
   return <NumberFormatBase {...patternFormatProps} />;