fix attempt 3 for ci cd

requirements.txt

@@ -2,7 +2,7 @@ bayescd>=0.4
 changepy>=0.3.1
 hyperopt>=0.1.2
 numpy>=1.17.5, <=1.22.4
-pandas>=0.25.3, <=2.0.0
+pandas>=0.25.3, <=1.5.3
 pykalman>=0.9.5
 scipy>=1.6.0
 statsmodels>=0.13.0