build: update mdv dev. dep.

Signed-off-by: Mike Ralphson <[email protected]>

Author: MikeRalphson

package.json

@@ -29,7 +29,7 @@
   "devDependencies": {
     "@hyperjump/json-schema": "^0.17.0",
     "chai": "^4.3.1",
-    "mdv": "^1.0.7",
+    "mdv": "^1.3.4",
     "mocha": "^8.3.0",
     "yaml": "^1.8.3"
   },