fix

book/node_modules/crc/lib/es6/create_buffer.js

@@ -0,0 +1,14 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _buffer = require('buffer');
+
+var createBuffer = _buffer.Buffer.from && _buffer.Buffer.alloc && _buffer.Buffer.allocUnsafe && _buffer.Buffer.allocUnsafeSlow ? _buffer.Buffer.from : // support for Node < 5.10
+function (val) {
+  return new _buffer.Buffer(val);
+};
+
+exports.default = createBuffer;