Add french language

Author: Joilson

resources/languages/iso6391.php

@@ -15,4 +15,8 @@
         'name' => 'Portuguese',
         'code' => 'pt',
     ],
+    'fr' => [
+        'name' => 'French',
+        'code' => 'fr',
+    ],
 ];

src/Geography/CountryList.php

@@ -25,4 +25,9 @@ public static function ES() : Country
     {
         return new Country('Spain', 'ES', 'ESP');
     }
+
+    public static function FR() : Country
+    {
+        return new Country('France', 'FR', 'FRA');
+    }
 }

tests/Geography/CountryListTest.php

@@ -32,6 +32,7 @@ public function objectDataProvider() : array
             [CountryList::BR(), ['Brazil', 'BR', 'BRA']],
             [CountryList::US(), ['United States Of America', 'US', 'USA']],
             [CountryList::ES(), ['Spain', 'ES', 'ESP']],
+            [CountryList::FR(), ['France', 'FR', 'FRA']],
         ];
     }
 }