chore(deps): bump vega from 5.29.0 to 5.30.0 (#193)

Author: dependabot[bot]

package.json

@@ -9,7 +9,7 @@
     "@heavyai/connector": "^7.0.0",
     "apache-arrow": "^16.1.0",
     "gh-pages": "^6.1.1",
-    "vega": "^5.29.0",
+    "vega": "^5.30.0",
     "vega-transform-omnisci-core": "^0.0.12"
   },
   "scripts": {