readded dask and added tabulate==0.8.9 to requirements.txt

requirements.txt

@@ -2,6 +2,7 @@
 astropy==4.1
 auto_mix_prep==0.2.0
 Cartopy==0.18.0
+dask==2021.10.0
 dill==0.3.3
 keras==2.6.0
 keras_nightly==2.5.0.dev2021032900
@@ -17,6 +18,7 @@ seaborn==0.11.1
 setuptools==47.1.0
 six==1.15.0
 statsmodels==0.12.2
+tabulate==0.8.9
 tensorflow==2.5.0
 typing_extensions==3.7.4.3
 wget==3.2