Incompatible dependecy version fixed with pylint-django and prospector

Author: csranasinghe

requirements/lint.txt

@@ -3,7 +3,8 @@
 astroid<=2.0.4  # pyup: ignore
 # prospector 1.1.6.2 is not compatible with 2.2.2
 pylint<=2.1.1  # pyup: ignore
-pylint-django<2.0.5  # pyup: ignore
+# prospector 1.1.6.2 is not compatible with 2.0.3
+pylint-django==2.0.2  # pyup: ignore
 pylint-celery==0.3
 prospector==1.1.6.2
 # prospector 1.1.6.2 is not compatible with 2.0.0