fix(pkg): add default fallback to exports (#688)

Author: wolfy1339

scripts/build.mjs

@@ -61,12 +61,12 @@ async function main() {
       {
         ...pkg,
         files: ["dist-*/**", "bin/**"],
-        main: "dist-bundle/index.js",
         types: "dist-types/index.d.ts",
         exports: {
           ".": {
             types: "./dist-types/index.d.ts",
             import: "./dist-bundle/index.js",
+            default: "./dist-bundle/index.js",
           },
         },
         sideEffects: false,