actually fix minified export paths

Re: #334

Author: isaacs

Diff for: package.json

@@ -11,8 +11,7 @@
   "sideEffects": false,
   "scripts": {
     "build": "npm run prepare",
-    "prepare": "tshy",
-    "postprepare": "bash fixup.sh",
+    "prepare": "tshy && bash fixup.sh",
     "pretest": "npm run prepare",
     "presnap": "npm run prepare",
     "test": "tap",
@@ -105,8 +104,8 @@
     },
     "./min": {
       "import": {
-        "types": "./dist/mjs/index.d.ts",
-        "default": "./dist/mjs/index.min.js"
+        "types": "./dist/esm/index.d.ts",
+        "default": "./dist/esm/index.min.js"
       },
       "require": {
         "types": "./dist/commonjs/index.d.ts",