JavaScript bridge should define "uia.actionSheet()" like it does for "uia.alert()"

[jmoody]

@krukow Is there some secret sauce that defines "uia.alert()" ?

irb(main):014:0> uia("uia.actionSheet()")
{
       "status" => "error",
        "value" => "TypeError: undefined is not a function (evaluating 'uia.actionSheet()')",
    "backtrace" => "eval code\neval@[native code]\nglobal code@file:///Users/moody/git/briar-ios-example/Briar/390BD2DF-918D-428F-A1EA-0B143FFBCDB5/_run_loop.js:23632:27",
        "index" => 12
}
irb(main):015:0> uia("UIATarget.localTarget().frontMostApp().actionSheet()")
{
    "status" => "success",
     "value" => "[object UIAActionSheet]",
     "index" => 13
}

[krukow]

The source is the Sauce: https://github.com/krukow/calabash-script/blob/master/src/cljs/calabash_script/exports.cljs#L68

[jmoody]

Fixed.