Add assessmentType to context.json for assessment extension

Author: xaviaracil

extensions/assessmentExtension/v2p0/context.json

@@ -16,6 +16,7 @@
         "Performance": "extensions:AssessmentExtensionPerformance",
         "TextQuestion": "extensions:AssessmentExtensionTextQuestion",
         "assessmentEvaluation": "extensions:assessmentEvaluation",
+        "assessmentType": "extensions:assessmentType",
         "assessmentExample": "extensions:assessmentExample",
         "assessmentOutput": "extensions:assessmentOutput",
         "characterLimit": "extensions:assessmentCharacterLimit",