Always run garbage collection explicitly in PyPy for the GC-related NumPy tests.

tests/memoryview/numpy_memoryview.pyx

@@ -17,6 +17,10 @@ include "../buffers/mockbuffers.pxi"
 
 ctypedef np.int32_t dtype_t
 
+IS_PYPY = hasattr(sys, 'pypy_version_info')
+NUMPY_VERSION = tuple(int(v) for v in np.__version__.split('.')[:2])
+print(NUMPY_VERSION)
+
 def get_array():
     # We need to type our array to get a __pyx_get_buffer() that typechecks
     # for np.ndarray and calls __getbuffer__ in numpy.pxd
@@ -39,15 +43,13 @@ def testcase(f):
     return f
 
 def testcase_numpy_1_5(f):
-    major, minor, *rest = np.__version__.split('.')
-    if (int(major), int(minor)) >= (1, 5):
+    if NUMPY_VERSION >= (1, 5) or IS_PYPY:
         __test__[f.__name__] = f.__doc__
     return f
 
 
 def gc_collect_if_required():
-    major, minor, *rest = np.__version__.split('.')
-    if (int(major), int(minor)) >= (1, 14):
+    if NUMPY_VERSION >= (1, 14) or IS_PYPY:
         import gc
         gc.collect()