Update pylint version

Author: samwelkanda

Pipfile

@@ -9,10 +9,10 @@ pre-commit = "==2.10.1"
 
 [dev-packages] # Packages required to develop the application
 coverage = "==5.0.3"
-pylint = "==2.6.0"
 responses = "==0.10.12"
 flit = "==2.2.0"
 azure-identity = "==1.5.0"
 isort = "==5.7.0"
 yapf = "==0.30.0"
 mypy = "==0.800"
+pylint = "==2.7.4"