Stick with snowpack version 3.0.x, as of now, newer version has a regression

Author: jihchi

package.json

@@ -50,6 +50,6 @@
     "@web/test-runner": "^0.12.19",
     "chai": "^4.3.4",
     "rescript": "^9.1.1",
-    "snowpack": "^3.3.3"
+    "snowpack": "~3.0"
   }
 }