Pin numpy 1.17 for python 3.8
# numpy pinning for ABI forward-compatibility
-numpy==1.16.5 ; python_version < "3.9"
+numpy==1.16.5 ; python_version < "3.8"
+numpy==1.17.* ; python_version == "3.8"
numpy==1.19.4 ; python_version >= "3.9"
#-------------------------------
