flatten-array: Make canonical-data.json compliant

Author: rbasso

exercises/flatten-array/canonical-data.json

@@ -1,29 +1,36 @@
 {
+   "exercise": "flatten-array",
+   "version": "1.0.0",
    "cases": [
       {
          "description": "flattens array with just integers present",
+         "property": "flatten",
          "input": [1,[2,3,4,5,6,7],8],
          "expected": [1,2,3,4,5,6,7,8]
       },
       {
          "description": "5 level nesting",
+         "property": "flatten",
          "input": [0, 2, [[2, 3], 8, 100, 4,[[[50]]]], -2],
          "expected":[0, 2, 2, 3, 8, 100, 4, 50, -2]
       },
       {
          "description": "6 level nesting",
+         "property": "flatten",
          "input": [1,[2,[[3]],[4,[[5]]],6,7],8],
          "expected":[1,2,3,4,5,6,7,8]
       },
       {
          "description": "6 level nest list with null values",
+         "property": "flatten",
          "input": [0, 2, [[2, 3], 8, [[100]], null, [[null]]], -2],
          "expected":[0,2,2,3,8,100,-2]
       },
       {
          "description": "all values in nested list are null",
+         "property": "flatten",
          "input": [null,[[[null]]],null,null,[[null,null],null],null],
          "expected":[]
       }
    ]
-}
+}