Upgrade sharedmem to 0.3.8

requirements.txt

@@ -33,7 +33,7 @@ python-dateutil == 2.8.1
 pyyaml == 5.3
 pyzmq == 19.0.0
 scikit-learn == 0.22.2.post1
-sharedmem == 0.3.7 
+sharedmem == 0.3.8
 sphinx == 1.8.5
 tabulate == 0.8.6
 traitlets == 4.3.3