Unify webpack build

.webpack/webpack.config.babel.js

@@ -3,19 +3,16 @@ import nodeExternals from 'webpack-node-externals';
 import baseConfig from './webpack.config.base';
 
 export default (_env, args) => {
-  switch (args.mode) {
-    case 'development':
   return [
+    // non-minified
     baseConfig,
+    // core [To be used by webpack/esbuild/vite etc to bundle mermaid]
     merge(baseConfig, {
       externals: [nodeExternals()],
       output: {
         filename: '[name].core.js',
       },
     }),
-      ];
-    case 'production':
-      return [
     // umd
     merge(baseConfig, {
       output: {
@@ -39,7 +36,4 @@ export default (_env, args) => {
       },
     }),
   ];
-    default:
-      throw new Error('No matching configuration was found!');
-  }
 };