feat: add certification thing

test/resources/indexable/AcademicEvent.2.json

@@ -5,18 +5,14 @@
     "description": "Grundlagen, algebraische Grundbegriffe, Vektorräume, lineare Abbildungen und Gleichungen, Determinanten",
     "uid": "b17eb963-42b5-5861-adce-2b7b2607ef0a",
     "name": "Lineare Algebra I für Mathematiker",
-    "categories": [
-      "lecture"
-    ],
+    "categories": ["lecture"],
     "academicTerms": [
       {
         "uid": "aacd5611-b5be-54ce-b39f-c52f7e9a631d",
         "type": "semester",
         "name": "Sommersemester 2018",
         "acronym": "SS 2018",
-        "alternateNames": [
-          "SoSe 2018"
-        ],
+        "alternateNames": ["SoSe 2018"],
         "startDate": "2018-04-01",
         "endDate": "2018-09-30",
         "eventsStartDate": "2018-04-09",
@@ -40,17 +36,11 @@
         "type": "catalog",
         "level": 3,
         "description": "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.",
-        "categories": [
-          "university events"
-        ],
+        "categories": ["university events"],
         "name": "Mathematik: Lehrveranstaltungen für andere Fachrichtungen (Service)"
       }
     ],
-    "majors": [
-      "Wirtschaftsmathematik BSc",
-      "Technomathematik BSc",
-      "Mathematik BSc"
-    ],
+    "majors": ["Wirtschaftsmathematik BSc", "Technomathematik BSc", "Mathematik BSc"],
     "origin": {
       "indexed": "2018-09-11T12:30:00Z",
       "name": "Dummy",