!2266 update numpy version in requirements.txt

Merge pull request !2266 from luoyang/update

requirements.txt

-numpy >= 1.17.0
+numpy >= 1.17.0, <= 1.17.5
 protobuf >= 3.8.0
 asttokens >= 1.1.13
 pillow >= 6.2.0
@@ -12,4 +12,4 @@ setuptools >= 40.8.0
 matplotlib >= 3.1.3         # for ut test
 opencv-python >= 4.2.0.32   # for ut test
 sklearn >= 0.0              # for st test
-pandas >= 1.0.2             # for ut test
+pandas >= 1.0.2             # for ut test
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