regex error after importing

Importing version 1.4.0 and compiling gives the following error

```
App.js:8623 Uncaught SyntaxError: Invalid regular expression: /[Ù-Ü]/: Range out of order in character class
at new RegExp ()
at regex (App.js:8623)
...
```

in a code block that begins

``` javascript
var _elm_community$string_extra$String_Extra$accentRegex = function () {
...
}
```

using Google Chrome | 61.0.3163.100 (Official Build) (64-bit).