Modified packagelocks to point a PR that fixes an issue

Author: kyranet

package-lock.json

@@ -25,6 +25,6 @@
     },
     "homepage": "https://github.com/kyranet/canvasConstructor#readme",
     "dependencies": {
-        "canvas": "github:automattic/node-canvas#98b7591df5260bda4c1ef36e1d22525705ec8ba1"
+        "canvas": "github:zbjornson/node-canvas#ctor2"
     }
 }