Add Buffer as type to prevent react-native crash

index.js

@@ -229,7 +229,7 @@ function compile (type) {
 }
 
 function typeforce (type, value, strict, surrogate) {
-  if (NATIVE.Function(type)) {
+  if (!NATIVE.Buffer(type) && NATIVE.Function(type)) {
     if (type(value, strict)) return true
 
     throw new TfTypeError(surrogate || type, value)

native.js

@@ -6,6 +6,7 @@ var types = {
   Number: function (value) { return typeof value === 'number' },
   Object: function (value) { return typeof value === 'object' },
   String: function (value) { return typeof value === 'string' },
+  Buffer: function (value) { return Buffer.isBuffer(value) },
   '': function () { return true }
 }