chore: moved source file to subfolder for better structure

Author: mfranzke

package.json

@@ -2,7 +2,7 @@
   "name": "loading-attribute-polyfill",
   "version": "2.0.0-rc.0",
   "description": "Fast and lightweight dependency-free vanilla JavaScript polyfill for native lazy loading / the awesome loading='lazy'-attribute.",
-  "source": "./loading-attribute-polyfill.js",
+  "source": "./src/loading-attribute-polyfill.js",
   "main": "./dist/loading-attribute-polyfill.js",
   "esmodule": "./dist/loading-attribute-polyfill.modern.js",
   "module": "./dist/loading-attribute-polyfill.module.js",
@@ -47,7 +47,7 @@
   },
   "scripts": {
     "test": "run-p validate:* lint:*",
-    "lint:xo": "xo loading-attribute-polyfill.js",
+    "lint:xo": "xo src/loading-attribute-polyfill.js",
     "validate:html": "html-validate demo/index.html",
     "test:wdio": "wdio run wdio.conf-crossbrowsertesting.js",
     "build": "microbundle",