chore(deps): change react to dev deps on js package (#2675)

packages/docsearch-js/rollup.config.js

@@ -8,14 +8,8 @@ import pkg from './package.json';
 export default [
   {
     input: 'src/index.ts',
+    external: ['@docsearch/react'],
     output: [
-      {
-        file: 'dist/umd/index.js',
-        format: 'umd',
-        sourcemap: true,
-        name: 'docsearch',
-        banner: getBundleBanner(pkg),
-      },
       {
         file: 'dist/esm/index.js',
         format: 'es',
@@ -32,5 +26,24 @@ export default [
       }),
     ],
   },
+  {
+    input: 'src/index.ts',
+    output: [
+      {
+        file: 'dist/umd/index.js',
+        format: 'umd',
+        sourcemap: true,
+        name: 'docsearch',
+        banner: getBundleBanner(pkg),
+      },
+    ],
+    plugins: [
+      ...plugins,
+      replace({
+        preventAssignment: true,
+        'process.env.NODE_ENV': JSON.stringify('production'),
+      }),
+    ],
+  },
   typesConfig,
 ];