Add test for version

Author: grantjenks

test_arraydeque.py

@@ -1,4 +1,5 @@
 import unittest
+import arraydeque
 from arraydeque import ArrayDeque
 
 
@@ -122,6 +123,9 @@ def test_overallocation_growth(self):
         self.assertEqual(list(self.deque), expected)
         self.assertEqual(len(self.deque), 100)
 
+    def test_version(self):
+        assert tuple(map(int, arraydeque.__version__.split("."))) > (0, 0, 0)
+
 
 if __name__ == '__main__':
     unittest.main()