[HOTFIX] Latest nilearn-0.5.0 breaks tests

Preempt tests from failing for now. I've opened an issue to investigate this further (#2791)

Author: oesteban

nipype/info.py

@@ -163,7 +163,7 @@ def get_nipype_gitversion():
     'doc': ['Sphinx>=1.4', 'numpydoc', 'matplotlib', 'pydotplus', 'pydot>=1.2.3'],
     'tests': TESTS_REQUIRES,
     'specs': ['yapf'],
-    'nipy': ['nitime', 'nilearn', 'dipy', 'nipy', 'matplotlib'],
+    'nipy': ['nitime', 'nilearn<0.5.0', 'dipy', 'nipy', 'matplotlib'],
     'profiler': ['psutil>=5.0'],
     'duecredit': ['duecredit'],
     'xvfbwrapper': ['xvfbwrapper'],