fix: replaced default export to named export

Author: Vikram Kalta

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@contentstack/delivery-sdk",
-  "version": "4.1.0",
+  "version": "5.0.0",
   "type": "commonjs",
   "main": "./dist/cjs/src/index.js",
   "types": "./dist/types/src/index.d.ts",

package.json

@@ -1,4 +1,4 @@
-import * as contentstack from './lib/contentstack';
+import contentstack from './lib/contentstack';
 export * from './lib/types';
 
-export default contentstack;
+export { contentstack as stack };

src/index.ts

@@ -112,3 +112,5 @@ export function stack(config: StackConfig): StackClass {
 
   return new StackClass(client, config);
 }
+
+export default stack;