Fix UMD library name

Author: cvle

webpack.config.js

@@ -5,7 +5,7 @@ const webpack = require("webpack");
 
 const useMinification = process.env.BUILD_MINIFIED === "true";
 const packageName = JSON.parse(fs.readFileSync("package.json", "utf8")).name;
-const libraryName = packageName.replace(/(^|-)(.)/g, (match, _, c) => (c ? c.toUpperCase() : ""));
+const libraryName = "ReactCSSTransition";
 
 const config = {
   entry: "./src/index.ts",