Merge pull request #259 from joshnuss/type-module

fix: Adds type: module to package.json. Closes #258

Author: joshnuss

.eslintrc.js renamed to .eslintrc.cjs

@@ -2,6 +2,7 @@
   "name": "svelte-persisted-store",
   "version": "0.0.0-development",
   "license": "MIT",
+  "type": "module",
   "main": "dist/index.js",
   "module": "dist/index.mjs",
   "types": "dist/index.d.ts",