fix: add buffer (#39)

src/crypto/tests/index.js

@@ -1,6 +1,7 @@
 /* eslint-env mocha */
 'use strict'
 
+const { Buffer } = require('buffer')
 const duplexPair = require('it-pair/duplex')
 const pipe = require('it-pipe')
 const peers = require('../../utils/peers')

src/stream-muxer/tests/close-test.js

@@ -2,6 +2,7 @@
 /* eslint max-nested-callbacks: ["error", 8] */
 'use strict'
 
+const { Buffer } = require('buffer')
 const pair = require('it-pair/duplex')
 const pipe = require('it-pipe')
 const { consume } = require('streaming-iterables')

src/transport/tests/listen-test.js

@@ -2,6 +2,7 @@
 /* eslint-env mocha */
 'use strict'
 
+const { Buffer } = require('buffer')
 const chai = require('chai')
 const dirtyChai = require('dirty-chai')
 const expect = chai.expect