Update installed version of jsonfield

requirements.txt

@@ -2,5 +2,5 @@ dogapi>=1.2.1,<2.0.0
 django-model-utils>=2.3.1,<3.0.0
 # Use the same DRF version as edx-platform
 git+https://github.com/edx/django-rest-framework.git@1ceda7c086fddffd1c440cc86856441bbf0bd9cb#egg=djangorestframework==3.6.3
-jsonfield>=1.0.3,<2.0.0
+jsonfield>=2.0.2,<3.0.0
 pytz

setup.py

@@ -33,7 +33,7 @@ def load_requirements(*requirements_paths):
 
 setup(
     name='edx-submissions',
-    version='2.0.6',
+    version='2.0.7',
     author='edX',
     description='An API for creating submissions and scores.',
     url='http://github.com/edx/edx-submissions.git',