Add pytest to dev dependencies

Author: jleclanche

pyproject.toml

@@ -13,14 +13,16 @@ classifiers = [
 	"Intended Audience :: End Users/Desktop",
 	"Topic :: Security",
 	"Topic :: Security :: Cryptography",
-
 ]
 
 [tool.poetry.dependencies]
 python = "^3.6"
 click = "^7.1.2"
 pyotp = "^2.4.0"
 
+[tool.poetry.dev-dependencies]
+pytest = "^6.2.1"
+
 [build-system]
 requires = ["poetry>=0.12"]
 build-backend = "poetry.masonry.api"