Updating imports because collections.abc has Iterable since py 3.3

Author: fsaraviara

pytest-verbose-parametrize/pytest_verbose_parametrize.py

@@ -1,7 +1,4 @@
-try:
-    from collections.abc import Iterable
-except ImportError:
-    from collections import Iterable
+from collections.abc import Iterable
 from six import string_types, text_type