fix: support modern esm and types resolution (#48)

Author: IlyaSemenov

package.json

@@ -2,6 +2,13 @@
   "name": "@stream-io/node-sdk",
   "version": "0.3.0",
   "description": "",
+  "exports": {
+    ".": {
+      "import": "./dist/index.es.js",
+      "require": "./dist/index.cjs.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
   "main": "dist/index.cjs.js",
   "module": "dist/index.es.js",
   "types": "dist/index.d.ts",