update evented-canvas (#1522)

package.json

@@ -65,7 +65,7 @@
     "i18next": "^4.2.0",
     "i18next-browser-languagedetector": "^1.0.1",
     "i18next-xhr-backend": "^1.3.0",
-    "iiif-evented-canvas": "0.0.1-alpha-5",
+    "iiif-evented-canvas": "^0.0.3-beta",
     "iiif-layout-functions": "0.0.2-alpha",
     "javascript-state-machine": "^2.3.4",
     "jquery": "^3.1.1",