Use fixed fork of pepjs

package.json

@@ -36,8 +36,8 @@
     "url": "https://github.com/openlayers/openlayers/issues"
   },
   "dependencies": {
+    "@openlayers/pepjs": "^0.5.3",
     "pbf": "3.2.0",
-    "pepjs": "^0.5.2",
     "pixelworks": "1.1.0",
     "rbush": "^3.0.0"
   },

src/ol/MapBrowserEventHandler.js

@@ -2,7 +2,7 @@
  * @module ol/MapBrowserEventHandler
  */
 
-import 'pepjs';
+import '@openlayers/pepjs';
 import {DEVICE_PIXEL_RATIO} from './has.js';
 import MapBrowserEventType from './MapBrowserEventType.js';
 import MapBrowserPointerEvent from './MapBrowserPointerEvent.js';

src/ol/control/MousePosition.js

@@ -6,7 +6,7 @@ import EventType from '../pointer/EventType.js';
 import {getChangeEventType} from '../Object.js';
 import Control from './Control.js';
 import {getTransformFromProjections, identityTransform, get as getProjection} from '../proj.js';
-import 'pepjs';
+import '@openlayers/pepjs';
 
 
 /**

src/ol/control/ZoomSlider.js

@@ -9,7 +9,7 @@ import {stopPropagation} from '../events/Event.js';
 import EventType from '../events/EventType.js';
 import {clamp} from '../math.js';
 import PointerEventType from '../pointer/EventType.js';
-import 'pepjs';
+import '@openlayers/pepjs';
 
 
 /**