fix typo rollup config (#38)

Author: kotarella1110

package.json

@@ -106,8 +106,7 @@
       "npm run lint:fix"
     ],
     "*.{md,json}": [
-      "prettier --write",
-      "git add"
+      "prettier --write"
     ]
   }
 }

rollup/createRollupConfig.js

@@ -14,7 +14,7 @@ import pkg from '../package.json';
 
 export function createRollupConfig(options) {
   const name = options.name || safePackageName(pkg.name);
-  const umdName = options.undName || pascalcase(safePackageName(pkg.name));
+  const umdName = options.umdName || pascalcase(safePackageName(pkg.name));
   const shouldMinify = options.minify || options.env === 'production';
   const tsconfigPath = options.tsconfig || 'tsconfig.json';
   const tsconfigJSON = ts.readConfigFile(tsconfigPath, ts.sys.readFile).config;