capitalize first letter in abbreviation

[jntagadiad]

before when the locale is "it" the month abbr was only on camelcase. now I suggest to add this feature to capitalize first letter in all locales

[hmkrivoj]

I'd rather not capitalize the first letter in the abbreviations for all languages, as there might be countries where you usually use the lower case version. I instead propose adding a boolean parameter uppercase to specify which version you'd like to use: true for uppercase, false for lowercase and null for the locale's default

[Macacoazul01]

@0wzZZzz6 i`m maintaining an updated version of this package, and your changes are there https://pub.dev/packages/month_picker_dialog_2

[Macacoazul01]

closed in favor of #52