Update package deps and blacklist pywin32 v226

Version 226 of pywin32 fails to install inside a virtual environment. See mhammond/pywin32#1439.

Pipfile

@@ -6,21 +6,22 @@ verify_ssl = true
 [dev-packages]
 yapf = "~=0.28.0"
 isort = {extras = ["pipfile"],version = "~=4.3.21"}
-rope = "*"
-pytest = "*"
+rope = "~=0.14"
+pytest = "~=5.0.1"
 pytest-cov = "*"
 pytest-mock = "*"
-pylint = "*"
+pylint = "~=2.4.3"
 mypy = "!=0.740"
-jupyter = "*"
-deepdiff = "*"
-pygments = "*"
+jupyter = "~=1.0"
+deepdiff = "~=4.0.9"
+pygments = "~=2.4"
 
 [packages]
 requests = "~=2.22.0"
 pydantic = "~=0.30.1"
 pyyaml = "~=5.1.1"
 psutil = "~=5.6.3"
+pywin32 = "!=226"
 
 [requires]
 python_version = "3.7"