Added defaultCountryByDialCode prop

[CharltonSantana]

Have added defaultCountryByDialCode prop, very similar to defaultCountry but uses dialCode
instead of iso2 for country map.
<vue-tel-input defaultCountryByDialCode="44" />

[CharltonSantana]

Hey, please let me know if there's anything like naming etc that you'd prefer to be changed.

[iamstevendao]

@CharltonSantana I'm thinking we can use the defaultCountry prop and allow it to be both number and string. if it's a string we fetch the country by country code and if it's a number we use the dial code. What do you think?

[CharltonSantana]

@iamstevendao Thank you for your patience on this. I think this is a good idea, I will get on it.

[Daniel4Digital]

This is a must feature for me. Any news @CharltonSantana? Will you rewrite your PR?

[ciaranpflanagan]

Is there any update on this PR? As mentioned above, we'd also find this would be very useful.

[antoci-alin]

Any updates for this one?