Add browser main file to make webpack 4 happy.

fnando · fnando · commit 768e926f6d62 · 2018-09-14T13:57:35.000-07:00
diff --git a/package.json b/package.json
@@ -8,6 +8,7 @@
   ],
   "main": "dist/sparkline.js",
   "module": "src/sparkline.js",
+  "browser": "dist/sparkline.js",
   "scripts": {
     "test": "mocha --require babel-core/register \"test/**/*_test.js\"",
     "js:dist:expanded": "webpack",
