rename int to num and add multinum for arrays of items - add a test case

test/simple/schema.yaml

@@ -181,12 +181,12 @@ workload:
 #
 # credits/ECTS
 #
-credits: 
+credits:
+    type: num 
     label: { 
         en: "credits and weight of mark",
         de: "Kreditpunkte und Gewichtung der Note in der Gesamtnote"
     }
-    type: int
     template: 
         de: "${value}CP Gewichtung: ${value}CP von 120CP "
         en: "${value}CP weight: ${value} / 120 "    
@@ -229,7 +229,7 @@ term:
         de: "Semester",
         en: "term"
     }
-    type: int
+    type: multinum
     template: 
         de: " ${value}. Semester"
         en: " ${value}. semester"