Update requirements.txt

Ben-Epstein · web-flow · commit e150a9427701 · 2021-10-20T16:43:41.000-04:00
Due to #483
diff --git a/requirements.txt b/requirements.txt
@@ -1,5 +1,5 @@
 cython>=0.27
-numpy>=1.16
+numpy>=1.20
 scipy>= 1.0
 scikit-learn>=0.20
 joblib>=1.0
