Add pipenv configuration and lock file

Author: laurentpellegrino

Pipfile

@@ -0,0 +1,18 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+cachetools = "==3.1.1"
+certifi = "==2020.6.20"
+chardet = "==3.0.4"
+idna = "==2.10"
+requests = "==2.24.0"
+six = "==1.15.0"
+urllib3 = "==1.25.10"
+
+[requires]
+python_version = "3.8"