add single, valid supported did to danubetech resolver implementation definition

Author: wip-abramson

implementations/DanubeTech.json

@@ -24,6 +24,9 @@
   "didResolvers": [{
     "id": "",
     "endpoint": "https://dev.uniresolver.io/1.0/identifiers",
-    "tags": ["did-key", "did-resolution"]
+    "tags": ["did-key", "did-resolution"],
+    "supportedDids": {
+      "valid": ["did:btc1:k1qypcylxwhf8sykn2dztm6z8lxm43kwkyzf07qmp9jafv3zfntmpwtks9hmnrw"]
+    }
   }]
 }