Merge pull request ggeop#55 from ggeop/dependabot/pip/nltk-3.4.5

Bump nltk from 3.4.1 to 3.4.5

Author: ggeop

requirements.txt

@@ -16,7 +16,7 @@ joblib==0.13.2
 lxml==4.3.4
 mock==3.0.5
 more-itertools==7.0.0
-nltk==3.4.1
+nltk==3.4.5
 numpy==1.16.4
 patch==1.16
 psutil==5.6.2