Update dependencies

requirements.txt

@@ -4,11 +4,10 @@ certifi==2020.12.5
 cffi==1.14.5
 chardet==3.0.4
 click==7.1.2
-cryptography==3.4.7
 cssselect==1.1.0
 dnspython==1.16.0
 docker==4.4.1
-feedparser==5.2.1
+feedparser==6.0.8
 gitdb==4.0.7
 GitPython==3.1.14
 google-api-core==1.26.3
@@ -17,7 +16,6 @@ google-cloud-core==1.6.0
 google-cloud-datastore==1.15.3
 google-cloud-storage==1.38.0
 googleapis-common-protos==1.53.0
-grpcio==1.37.1
 html-similarity==0.3.3
 httpretty==0.9.7
 idna==2.10