feat: replace protocol-buffers with protons

Ref ipfs/js-ipfs#991

.gitignore

@@ -40,3 +40,4 @@ test/test-data/go-ipfs-repo/LOG.old
 
 # while testing npm5
 package-lock.json
+yarn.lock

package.json

@@ -52,11 +52,11 @@
     "multihashes": "~0.4.9",
     "multihashing-async": "~0.4.6",
     "peer-id": "~0.10.0",
-    "protocol-buffers": "^3.2.1",
+    "protons": "^1.0.0",
     "safe-buffer": "^5.1.1"
   },
   "contributors": [
     "David Dias <daviddias.p@gmail.com>",
     "Friedel Ziegelmayer <dignifiedquire@gmail.com>"
   ]
-}
+}

src/record.js

@@ -1,11 +1,11 @@
 'use strict'
 
-const protobuf = require('protocol-buffers')
+const protons = require('protons')
 const Buffer = require('safe-buffer').Buffer
 const assert = require('assert')
 const PeerId = require('peer-id')
 
-const pb = protobuf(require('./record.proto')).Record
+const pb = protons(require('./record.proto')).Record
 const utils = require('./utils')
 
 class Record {