updated to abstract python version as long as its python 3

Author: alesanchezr

.devcontainer/devcontainer.json

@@ -21,7 +21,7 @@
 			"extensions": ["learn-pack.learnpack-vscode"]
 		}
 	},
-	"onCreateCommand": "pip3 install pytest==4.6.0 pytest-testdox mock && npm i @learnpack/[email protected] -g && learnpack plugins:install @learnpack/[email protected]"
+	"onCreateCommand": "pip3 install pytest==4.4.2 mock pytest-testdox toml && npm i @learnpack/[email protected] -g && learnpack plugins:install @learnpack/[email protected]"
 
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},

.learn/exercises/02-pipenv-installation/README.es.md

@@ -11,7 +11,7 @@ Cada proyecto de python debe estar envuelto en un "ambiente virtual" para asegur
 1. Ejecuta el siguiente comando para crear un nuevo entorno virtual con Python 3:
 
 ```bash
-$ pipenv --three
+$ pipenv install --python 3
 ```
 
 Deberías ver un  **PipFile** en la raíz de tu proyecto y dentro debería tener **[requires]** en la versión de Python 3+ similar a este (pero quizás con una diferente versión de Python 3).

.learn/exercises/02-pipenv-installation/README.md

@@ -11,7 +11,7 @@ Every python project should be wrapped in a "virtual environment" to ensure that
 1. Run the following command to create a new virtual environment with python 3 on it:
 
 ```bash
-$ pipenv --three
+$ pipenv install --python 3
 ```
 
 You should see a **PipFile** on the root of your project and it should have inside a **[requires]** for python version 3+ similar to this one (but maybe with a different python 3 version).

Pipfile

@@ -7,6 +7,3 @@ name = "pypi"
 flask = "*"
 
 [dev-packages]
-
-[requires]
-python_version = "3.8"