fix: remove default export

using a default export causes the module build file to be used by typescript when it transpiles to cjs, which then doesn't work for mixing esm and cjs. Simply removing the default line resolves the issue.

Fixes #57

package.json

@@ -7,7 +7,6 @@
   "main": "dist/jse-eval.cjs",
   "module": "dist/jse-eval.module.js",
   "exports": {
-    "default": "./dist/jse-eval.module.js",
     "import": "./dist/jse-eval.modern.js",
     "require": "./dist/jse-eval.cjs"
   },