fix: add pbjs namespace (#145)

To prevent namespace conflicts with protobuf message names.

Refs ipfs/js-ipfs-bitswap#323

Author: achingbrain

packages/ipfs-unixfs/package.json

@@ -9,7 +9,7 @@
   },
   "scripts": {
     "prepare": "run-s prepare:*",
-    "prepare:proto": "pbjs -t static-module -w commonjs --force-number --no-verify --no-delimited --no-create --no-beautify --no-defaults --lint eslint-disable -o src/unixfs.js ./src/unixfs.proto",
+    "prepare:proto": "pbjs -t static-module -w commonjs -r ipfs-unixfs --force-number --no-verify --no-delimited --no-create --no-beautify --no-defaults --lint eslint-disable -o src/unixfs.js ./src/unixfs.proto",
     "prepare:proto-types": "pbts -o src/unixfs.d.ts src/unixfs.js",
     "prepare:types": "aegir build --no-bundle",
     "test": "aegir test",

packages/ipfs-unixfs/src/unixfs.js

@@ -7,7 +7,7 @@ var $protobuf = require("protobufjs/minimal");
 var $Reader = $protobuf.Reader, $Writer = $protobuf.Writer, $util = $protobuf.util;
 
 // Exported root namespace
-var $root = $protobuf.roots["default"] || ($protobuf.roots["default"] = {});
+var $root = $protobuf.roots["ipfs-unixfs"] || ($protobuf.roots["ipfs-unixfs"] = {});
 
 $root.Data = (function() {