downgrade to kirby v3

vendor/ml/json-ld/Test/Fixtures/sample-serialized-document.jsonld

@@ -0,0 +1,23 @@
+[
+  {
+    "@id": "http://example.com/id1",
+    "@type": [ "http://example.com/t1" ],
+    "http://example.com/term1": [ {"@value": "v1"} ],
+    "http://example.com/term2": [ {"@value": "v2", "@type": "http://example.com/t2"} ],
+    "http://example.com/term3": [ {"@value": "v3", "@language": "en"} ],
+    "http://example.com/term4": [ {"@value": 4} ],
+    "http://example.com/term5": [
+      {"@value": 50 },
+      {"@value": 51 }
+    ],
+    "http://example.com/term6": [
+      { "@value": "1", "@type": "http://example.com/t1" },
+      { "@value": "2", "@type": "http://example.com/t2" },
+      { "@value": "3", "@language": "en" },
+      { "@value": "4", "@language": "de" }
+    ]
+  },
+  {
+    "@id": "http://example.com/t1"
+  }
+]