Merge pull request #2 from FieldControl/canvas-fix

fix: 🐛 canvas fix

Author: caiorsantanna

package.json

@@ -7,8 +7,10 @@
     "build": "ng build",
     "test": "ng test",
     "lint": "ng lint",
-    "e2e": "ng e2e"
+    "e2e": "ng e2e",
+    "postinstall": "npm run build"
   },
+  "main": "/dist/esm2015/angular2-signaturepad.js",
   "dependencies": {
     "@angular/animations": "~11.1.0",
     "@angular/common": "~11.1.0",