add webpack for browser compatibility

src/webpack.js

@@ -0,0 +1,43 @@
+const path = require('path');
+const webpack = require('webpack');
+
+module.exports = {
+  mode: "production",
+  target: "web",
+  entry: path.resolve(__dirname, 'index.ts'),
+  output: {
+    path: path.resolve(__dirname, '..', 'lib', 'browser'),
+    filename: "xrpio.browser.js",
+    libraryTarget: "window"
+  },
+  resolve: {
+    extensions: [".ts", ".tsx", ".js"],
+    fallback: {
+      "https": require.resolve("https-browserify"),
+      "zlib": require.resolve("browserify-zlib"),
+      "stream": require.resolve("stream-browserify"),
+      "crypto": require.resolve("crypto-browserify"),
+      "http": require.resolve("stream-http"),
+      "https": require.resolve("https-browserify")
+    }
+  },
+  module: {
+    rules: [
+      {
+        test: /\.ts?$/, 
+        loader: "ts-loader"
+      },
+    ]
+  },
+  optimization: {
+    minimize: false
+  },
+  externals: {
+  },
+  plugins: [
+    new webpack.ProvidePlugin({
+      process: 'process/browser',
+      Buffer: ['buffer', 'Buffer']
+    })
+  ]
+}