pkg: fix browserify build for x25519/x448.

lib/x25519-browser.js

@@ -0,0 +1,9 @@
+/*!
+ * x25519.js - x25519 for bcrypto
+ * Copyright (c) 2017-2019, Christopher Jeffrey (MIT License).
+ * https://github.com/bcoin-org/bcrypto
+ */
+
+'use strict';
+
+module.exports = require('./js/x25519');

lib/x448-browser.js

@@ -0,0 +1,9 @@
+/*!
+ * x448.js - x448 for bcrypto
+ * Copyright (c) 2017-2019, Christopher Jeffrey (MIT License).
+ * https://github.com/bcoin-org/bcrypto
+ */
+
+'use strict';
+
+module.exports = require('./js/x448');

package.json

@@ -85,6 +85,8 @@
     "./lib/sha512": "./lib/sha512-browser.js",
     "./lib/sha3": "./lib/sha3-browser.js",
     "./lib/siphash": "./lib/siphash-browser.js",
-    "./lib/whirlpool": "./lib/whirlpool-browser.js"
+    "./lib/whirlpool": "./lib/whirlpool-browser.js",
+    "./lib/x25519": "./lib/x25519-browser.js",
+    "./lib/x448": "./lib/x448-browser.js"
   }
 }