fix: fix preset export

Closes #532

Author: gregberge

packages/jest-puppeteer/.npmignore

@@ -0,0 +1,3 @@
+/*
+!/dist
+!jest-preset.js

packages/jest-puppeteer/package.json

@@ -5,13 +5,6 @@
   "type": "commonjs",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
-  "exports": {
-    ".": {
-      "types": "./dist/index.d.ts",
-      "default": "./dist/index.js"
-    },
-    "./package.json": "./package.json"
-  },
   "scripts": {
     "prebuild": "rm -rf dist",
     "build": "rollup -c"