feat(framework7-core): move to pure ES module package

Author: nolimits4web

build/core/bundle/package.json

@@ -1,14 +1,13 @@
 {
   "name": "framework7",
   "private": true,
-  "main": "cjs/framework7.js",
-  "module": "esm/framework7.js",
-  "jsnext:main": "esm/framework7.js",
+  "main": "framework7.esm.js",
+  "module": "framework7.esm.js",
+  "jsnext:main": "framework7.esm.js",
   "typings": "framework7.d.ts",
   "sideEffects": [
     "*.less",
     "*.css",
-    "cjs/utils/dom7.js",
-    "esm/utils/dom7.js"
+    "shared/dom7.js"
   ]
 }