feat: fix broken enum declaration (#1819)

After #1800 merged, the refactoring 286c02f was performed and enum declaration was back to previous one.
So type error mentioned at #1210 for maskUnits should occurred again.

src/elements/Marker.tsx

@@ -4,15 +4,9 @@ import { NumberProp } from '../lib/extract/types';
 import Shape from './Shape';
 import { RNSVGMarker } from './NativeComponents';
 
-export enum MarkerUnits {
-  STROKE_WIDTH = 'strokeWidth',
-  USER_SPACE_ON_USE = 'userSpaceOnUse',
-}
+export type MarkerUnits = 'strokeWidth' | 'userSpaceOnUse';
 
-export enum Orient {
-  AUTO = 'auto',
-  AUTO_START_REVERSE = 'auto-start-reverse',
-}
+export type Orient = 'auto' | 'auto-start-reverse';
 
 export interface MarkerProps {
   children?: ReactNode;

src/elements/Mask.tsx

@@ -10,14 +10,7 @@ import units from '../lib/units';
 import Shape from './Shape';
 import { RNSVGMask } from './NativeComponents';
 
-export enum EMaskUnits {
-  USER_SPACE_ON_USE = 'userSpaceOnUse',
-  OBJECT_BOUNDING_BOX = 'objectBoundingBox',
-}
-
-export type TMaskUnits =
-  | EMaskUnits.USER_SPACE_ON_USE
-  | EMaskUnits.OBJECT_BOUNDING_BOX;
+export type TMaskUnits = 'userSpaceOnUse' | 'objectBoundingBox';
 
 export interface MaskProps extends CommonPathProps {
   children?: ReactNode;