Make sure that loose version is used for version check

jenshnielsen · jenshnielsen · commit a32cb095b0d3 · 2016-06-08T18:03:01.000+01:00
This fix is on 1.5.x but not on 2.x seems like something went wrong in the merge
diff --git a/lib/matplotlib/tests/test_axes.py b/lib/matplotlib/tests/test_axes.py
@@ -88,7 +88,7 @@ def test_formatter_ticker():
 
 @image_comparison(baseline_images=["formatter_large_small"])
 def test_formatter_large_small():
-    if tuple(map(int, np.__version__.split('.'))) >= (1, 11, 0):
+    if LooseVersion(np.__version__) >= LooseVersion('1.11.0'):
         raise KnownFailureTest("Fall out from a fixed numpy bug")
     # github issue #617, pull #619
     fig, ax = plt.subplots(1)
