v14.0.0: upgrade to nutmeg

This is a minimal upgrade. We should upgrade the underlying services in the
near future. We should also upgrade to the v1 plugin API.

setup.py

@@ -39,7 +39,7 @@ def load_about():
     packages=find_packages(exclude=["tests*", "contrib*"]),
     include_package_data=True,
     python_requires=">=3.5",
-    install_requires=["tutor>=13.0.0,<14.0.0"],
+    install_requires=["tutor>=14.0.0,<15.0.0"],
     entry_points={
         "tutor.plugin.v0": [
             "richie = tutorrichie.plugin"
@@ -51,8 +51,6 @@ def load_about():
         "License :: OSI Approved :: GNU Affero General Public License v3",
         "Operating System :: OS Independent",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

tutorrichie/__about__.py

@@ -1 +1 @@
-__version__ = "13.0.2"
+__version__ = "14.0.0"