add string type to compass gravity (#516)

Author: strausr

__TESTS__/unit/values/gravity/CompassGravity.test.ts

@@ -15,4 +15,8 @@ describe('Tests for Compass Gravity', () => {
     expect(Gravity.compass(Compass.southEast()).toString()).toBe('g_south_east');
     expect(Gravity.compass(Compass.northEast()).toString()).toBe('g_north_east');
   });
+
+  it('Should accept string as input', () => {
+    expect(Gravity.compass('north_west').toString()).toBe('g_north_west');
+  });
 });

src/qualifiers/gravity.ts

@@ -10,7 +10,7 @@ import {XYCenterGravity} from "./gravity/xyCenterGravity/XYCenterGravity.js";
  * @description Defines the gravity based on directional values from a compass.
  * <b>Learn more:</b> {@link https://cloudinary.com/documentation/image_transformations#control_gravity|Control gravity for images}
  * <b>Learn more:</b> {@link https://cloudinary.com/documentation/image_transformations#control_gravity|Control gravity for videos}
- * @param {Qualifiers.Compass} direction A compass Values
+ * @param {Qualifiers.Compass | string} direction A compass Values
  * @memberOf Qualifiers.Gravity
  * @example
  * import {Cloudinary} from "@cloudinary/url-gen";
@@ -23,7 +23,7 @@ import {XYCenterGravity} from "./gravity/xyCenterGravity/XYCenterGravity.js";
  * image.resize(crop().width(300).gravity(compass(north())))
  * @return {CompassGravity}
  */
-function compass(direction: CompassQualifier): CompassGravity {
+function compass(direction: CompassQualifier | string): CompassGravity {
   return new CompassGravity(direction);
 }
 

src/qualifiers/gravity/compassGravity/CompassGravity.ts

@@ -10,7 +10,7 @@ type ICompassGravity = 'north' | 'center' | 'east' | 'west' | 'south' | 'north_w
  */
 class CompassGravity extends GravityQualifier {
   private type:'gravity';
-  constructor(dir: CompassQualifier) {
+  constructor(dir: CompassQualifier | string) {
     // Required due to https://github.com/microsoft/TypeScript/issues/13029
     /* istanbul ignore next */
     super(dir);