chore/MIG-6918 Bundle as cjs to support react17 (#56)

* bundle as cjs

* rename

Author: mabaasit

eslint.config.js renamed to eslint.config.mjs

@@ -3,9 +3,21 @@
   "description": "Diagram canvas for data modelling capabilities in MongoDB",
   "version": "0.0.0",
   "license": "MIT",
-  "main": "dist/modelling.es.js",
+  "main": "dist/modelling.cjs.js",
+  "module": "dist/modelling.es.js",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/modelling.es.js"
+      },
+      "require": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/modelling.cjs.js"
+      }
+    }
+  },
   "types": "dist/index.d.ts",
-  "type": "module",
   "author": {
     "name": "MongoDB Inc",
     "email": "[email protected]"

package.json

@@ -12,7 +12,7 @@ export default defineConfig({
     lib: {
       entry: 'src/index.ts',
       fileName: format => `modelling.${format}.js`,
-      formats: ['es'],
+      formats: ['es', 'cjs'],
     },
     rollupOptions: {
       external: ['react', 'react/jsx-runtime', 'react-dom', /@leafygreen-ui\/*/, '@emotion/react'],