Fix latin to cyr conversion for letter v

Author: atabekm

kaalin/constants.py

@@ -167,7 +167,7 @@
   't': 'т',
   'u': 'у',
   'ú': 'ү',
-  'v': 'б',
+  'v': 'в',
   'w': 'ў',
   'y': 'й',
   'z': 'з',

test/test_kaalin_converter.py

@@ -24,6 +24,7 @@ def test_latin2cyrillic(self):
     self.assertEqual(latin2cyrillic("Olarǵa"), "Оларға")
     self.assertEqual(latin2cyrillic("qádir-qımbat"), "қәдир-қымбат")
     self.assertEqual(latin2cyrillic("yupiter"), "юпитер")
+    self.assertEqual(latin2cyrillic("evropa"), "европа")
     self.assertEqual(latin2cyrillic("ÁJINIYAZ"), "ӘЖИНИЯЗ")