Add default extensions

Author: mottox2

lib/build.js

@@ -48,7 +48,7 @@ function webpackConfig(dir, additionalConfig) {
   var webpackConfig = {
     mode: "production",
     resolve: {
-      extensions: ['.js', '.mjs', '.ts']
+      extensions: ['.wasm', '.mjs', '.js', '.json', '.ts']
     },
     module: {
       rules: [