build: fix type after magick enum change

Author: erik-perri

__tests__/utils/getInsetAtGravity.test.ts

@@ -63,7 +63,7 @@ describe('getInsetAtGravity', () => {
     let result: number | undefined = undefined;
 
     ImageMagick.read(readFileSync(`samples/input/${file}`), (image) => {
-      result = getInsetAtGravity(image, gravity as number);
+      result = getInsetAtGravity(image, gravity);
     });
 
     expect(result).toEqual(expected);

src/utils/getInsetAtGravity.ts

@@ -9,7 +9,11 @@ const HIGHEST_ANDROID_SHADOW_ALPHA = 77;
 
 export default function getInsetAtGravity(
   image: IMagickImage,
-  gravity: Gravity.North | Gravity.East | Gravity.South | Gravity.West,
+  gravity:
+    | typeof Gravity.North
+    | typeof Gravity.East
+    | typeof Gravity.South
+    | typeof Gravity.West,
   axisOffset?: number,
   alphaCutoff: number = HIGHEST_ANDROID_SHADOW_ALPHA,
 ): number {