props inputOptions.placeholder not works

[azulkipli]

Hi, thanks for created this vue plugin

i already set custom props inputOptions.placeholder follow doc here

but I think this props option seem not work, any other option to customize / override this placeholder ?

https://github.com/iamstevendao/vue-tel-input/blob/main/src/components/vue-tel-input.vue#L37

[azulkipli]

I think my issue above will be solved by this PR

Hope this PR merge and released soon

@iamstevendao

thanks