Use buffer npm package

index.js

@@ -1,6 +1,6 @@
 'use strict'
 
-const Buffer = require('buffer').Buffer
+const Buffer = require('buffer/').Buffer
 const types = require('./types')
 const rcodes = require('./rcodes')
 const opcodes = require('./opcodes')

package.json

@@ -17,7 +17,8 @@
     "coverage": "nyc -r html npm test"
   },
   "dependencies": {
-    "@leichtgewicht/ip-codec": "^2.0.1"
+    "@leichtgewicht/ip-codec": "^2.0.1",
+    "buffer": "^6.0.3"
   },
   "devDependencies": {
     "eslint": "^5.14.1",

test.js

@@ -1,5 +1,6 @@
 'use strict'
 
+const Buffer = require('buffer/').Buffer
 const tape = require('tape')
 const packet = require('./')
 const rcodes = require('./rcodes')