fixed code for british vergin islands

fixed the example code in readme.

Author: Sameer Shelavale

README.md

@@ -49,8 +49,8 @@ $countries = CountryArray::get( null, 'alpha2' ); // return array of alpha2 code
 
 Get 2d array
 ```
-$countries = CountryArray::get( null, 'name' ); // return array of country names
-$countries = CountryArray::get( null, 'alpha2' ); // return array of alpha2 codes
+$countries = CountryArray::get2d( null, 'name' ); // return array of country names
+$countries = CountryArray::get2d( null, 'alpha2' ); // return array of alpha2 codes
 ```
 
 

src/CountriesArray.php

@@ -260,7 +260,7 @@ class CountriesArray{
         "VU" => array( 'alpha2'=>'VU', 'alpha3'=>'VUT', 'num'=>'548', 'isd'=> '678', "name" => "Vanuatu", "continent" => "Oceania"),
         "VE" => array( 'alpha2'=>'VE', 'alpha3'=>'VEN', 'num'=>'862', 'isd'=> '58', "name" => "Venezuela", "continent" => "South America"),
         "VN" => array( 'alpha2'=>'VN', 'alpha3'=>'VNM', 'num'=>'704', 'isd'=> '84', "name" => "Viet Nam", "continent" => "Asia"),
-        "VG" => array( 'alpha2'=>'VG', 'alpha3'=>'VG', 'num'=>'092', 'isd'=> '1284', "name" => "Virgin Islands, British", "continent" => "North America"),
+        "VG" => array( 'alpha2'=>'VG', 'alpha3'=>'VGB', 'num'=>'092', 'isd'=> '1284', "name" => "Virgin Islands, British", "continent" => "North America"),
         "VI" => array( 'alpha2'=>'VI', 'alpha3'=>'VIR', 'num'=>'850', 'isd'=> '1430', "name" => "Virgin Islands, U.S.", "continent" => "North America"),
         "WF" => array( 'alpha2'=>'WF', 'alpha3'=>'WLF', 'num'=>'876', 'isd'=> '681', "name" => "Wallis and Futuna", "continent" => "Oceania"),
         "EH" => array( 'alpha2'=>'EH', 'alpha3'=>'ESH', 'num'=>'732', 'isd'=> '212', "name" => "Western Sahara", "continent" => "Africa"),