Change 'store' and 'price' separator from hyphen

[dallanlee]

Currently the "separator" between the "store" option and the "price" option is a hardcoded - (hyphen). I think it should be removed entirely so that the user can add their own in the options or change it to an — (em dash).

For example, if you removed it, you could show that the default settings are:

...
store: {
    ios: '— On the App Store',
    android: '— In Google Play'
},
price: {
    ios: 'GET',
    android: 'FREE'
},
...

Thus allowing the user to decide what kind of dash looks best. Thanks for the great plugin!