Fixed kotlinx-coroutines-core.js main file

Author: elizarov

js/kotlinx-coroutines-core-js/npm/package.json

@@ -2,7 +2,7 @@
   "name": "kotlinx-coroutines-core",
   "version" : "$version",
   "description" : "Library support for Kotlin coroutines",
-  "main" : "kotlinx-coroutines-core-js.js",
+  "main" : "kotlinx-coroutines-core.js",
   "author": "JetBrains",
   "license": "Apache-2.0",
   "homepage": "https://github.com/Kotlin/kotlinx.coroutines",