fix: support all the Buffer shims and load fixtures correctly

* test: add failing test with Buffer package

* chore

* fix: fixtures are loaded using the same call in node and browser

* chore: update deps

* chore: update deps

.aegir.js

@@ -7,7 +7,7 @@ const server = createServer()
 module.exports = {
   karma: {
     files: [{
-      pattern: 'node_modules/interface-ipfs-core/test/fixtures/**/*',
+      pattern: 'node_modules/interface-ipfs-core/js/test/fixtures/**/*',
       watched: false,
       served: true,
       included: false

package.json

@@ -35,7 +35,7 @@
     "glob": "^7.1.2",
     "ipfs-block": "~0.6.1",
     "ipfs-unixfs": "~0.1.14",
-    "ipld-dag-pb": "~0.11.4",
+    "ipld-dag-pb": "~0.13.0",
     "is-ipfs": "^0.3.2",
     "is-stream": "^1.1.0",
     "lru-cache": "^4.1.1",
@@ -65,13 +65,13 @@
     "url": "https://github.com/ipfs/js-ipfs-api"
   },
   "devDependencies": {
-    "aegir": "^12.4.0",
+    "aegir": "^13.0.0",
     "chai": "^4.1.2",
     "dirty-chai": "^2.0.1",
     "eslint-plugin-react": "^7.6.1",
     "go-ipfs-dep": "^0.4.13",
     "gulp": "^3.9.1",
-    "interface-ipfs-core": "~0.48.0",
+    "interface-ipfs-core": "~0.49.1",
     "hapi": "^17.2.0",
     "ipfsd-ctl": "~0.28.0",
     "pre-commit": "^1.2.2",

src/files/add.js

@@ -4,6 +4,7 @@ const promisify = require('promisify-es6')
 const ConcatStream = require('concat-stream')
 const once = require('once')
 const isStream = require('is-stream')
+const OtherBuffer = require('buffer').Buffer
 const SendFilesStream = require('../utils/send-files-stream')
 
 module.exports = (send) => {
@@ -23,7 +24,8 @@ module.exports = (send) => {
 
     const ok = Buffer.isBuffer(_files) ||
                isStream.readable(_files) ||
-               Array.isArray(_files)
+               Array.isArray(_files) ||
+               OtherBuffer.isBuffer(_files)
 
     if (!ok) {
       return callback(new Error('"files" must be a buffer, readable stream, or array of objects'))