Merge pull request #44 from PacktPublishing/dependabot/pip/tornado-6.4.1

Bump tornado from 6.3.2 to 6.4.1

Author: gr33ndata

requirements.txt

@@ -76,7 +76,7 @@ statsmodels==0.10.2
 terminado==0.8.3
 testpath==0.4.4
 thinc==7.3.1
-tornado==6.3.3
+tornado==6.4.1
 tqdm==4.41.1
 traitlets==4.3.3
 urllib3==1.26.19