Out-of-date browser support

[akrawchyk]

Browser support includes every sane browser and IE7+.

I believe this statement in the README is incorrect. Even in the horsey.es5.js file, the ES6 Symbol is being used without a polyfill. Because of this, among other issues, horsey does not work on any version of IE.

[akrawchyk]

Also, I believe IE11 is barfing on this throw with error Object expected:

https://github.com/bevacqua/horsey/blob/master/dist/horsey.js#L434

try -> catch -> finally -> try -> finally -> throw ( ⧉ ⦣ ⧉ )

[akrawchyk]

The culprit might be the for (... of ...) loop here

horsey/horsey.js

Line 364 in b975868

for (let char of text) {

which looks like it's being transformed with babel or something to provide the feature with ES5.

[akrawchyk]

This also seems to be related babel/babel#4451.

Specifically babel/babel#4451 (comment) which looks similar to the bundled output.