Update requirements

Author: hermansje

requirements.txt

@@ -1,6 +1,5 @@
 # pythonwhat deps
-#protowhat~=1.6.0
-git+https://github.com/datacamp/protowhat.git@v1.6.0-rc.0
+protowhat~=1.6.0
 asttokens~=1.1.10
 dill~=0.2.7.1
 markdown2~=2.3.5

setup.py

@@ -6,7 +6,7 @@
 from setuptools import setup
 
 PACKAGE_NAME = "pythonwhat"
-REQUIREMENT_NAMES = ["markdown2", "jinja2", "asttokens", "dill"]
+REQUIREMENT_NAMES = ["protowhat", "markdown2", "jinja2", "asttokens", "dill"]
 PEER_REQUIREMENTS = ["numpy", "pandas"]
 
 HERE = path.abspath(path.dirname(__file__))