Fix: Jest expects commonjs module by default(#98)

- Use commonjs module as default
- Bundle into dist, removes the need of cp-css script

To do - 
* Revert exports: 'named'

Author: aburgel

package.json

@@ -2,12 +2,11 @@
   "name": "sendbird-uikit",
   "version": "2.6.0",
   "description": "React based UI kit for sendbird",
-  "main": "release/index.js",
-  "style": "release/dist/index.css",
-  "typings": "release/index.d.ts",
-  "module": "release/index.js",
+  "main": "dist/cjs/index.js",
+  "style": "dist/index.css",
+  "typings": "dist/index.d.ts",
+  "module": "dist/index.js",
   "files": [
-    "release/**/*",
     "dist/**/*",
     "package-lock.json",
     "LICENSE",
@@ -19,9 +18,8 @@
   "scripts": {
     "test": "jest",
     "test-update-snapshot": "jest -u",
-    "cp-css": "./scripts/copy-css.sh",
-    "clean-release": "rm -rf ./release; rm -rf ./dist",
-    "build": "npm run clean-release; rollup -c; npm run cp-css",
+    "clean-release": "rm -rf ./dist",
+    "build": "npm run clean-release; rollup -c",
     "start": "rollup -c -w",
     "prepublishOnly": "npm run build",
     "predeploy": "cd example && npm install && npm run build",

rollup.config.js

@@ -35,14 +35,16 @@ module.exports = ({
   },
   output: [
     {
-      dir: 'release/dist/cjs',
+      dir: 'dist/cjs',
       format: 'cjs',
       sourcemap: true,
+      exports: 'named'
     },
     {
-      dir: 'release',
+      dir: 'dist',
       format: 'esm',
       sourcemap: true,
+      exports: 'named'
     },
   ],
   external: [
@@ -63,7 +65,7 @@ module.exports = ({
         autoprefixer,
       ],
       sourceMap: true,
-      extract: 'dist/index.css',
+      extract: 'index.css',
       extensions: ['.sass', '.scss', '.css'],
     }),
     replace({
@@ -97,6 +99,7 @@ module.exports = ({
           },
         ],
       ],
+      babelHelpers: 'bundled',
       extensions: ['.tsx', '.ts', '.jsx', '.js'],
       exclude: 'node_modules/**',
       plugins: [
@@ -114,7 +117,7 @@ module.exports = ({
       targets: [
         {
           src: './src/index.d.ts',
-          dest: 'release',
+          dest: 'dist',
         },
       ],
     }),