update packages.json

Author: clarasb

chartlets.js/package-lock.json

@@ -35,7 +35,7 @@
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-vega": "^7.7.1",
-    "vega": "6.2.0",
+    "vega": "^6.2.0",
     "vega-embed": "^7.1.0",
     "vega-lite": "^6.4.1",
     "vega-themes": ">=2",

chartlets.js/packages/demo/package.json

@@ -66,7 +66,7 @@
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-vega": "^7.7.1",
-    "vega": "6.2.0",
+    "vega": "^6.2.0",
     "vega-embed": "^7.1.0",
     "vega-lite": "^6.4.1",
     "vega-themes": ">=2"