chore: update deps

Author: daviddias

package.json

@@ -73,7 +73,7 @@
     "expose-loader": "^0.7.5",
     "form-data": "^2.3.2",
     "hat": "0.0.3",
-    "interface-ipfs-core": "^0.61.0",
+    "interface-ipfs-core": "^0.64.2",
     "ipfsd-ctl": "^0.32.1",
     "lodash": "^4.17.10",
     "mocha": "^5.1.1",
@@ -162,7 +162,6 @@
     "pull-zip": "^2.0.1",
     "read-pkg-up": "^3.0.0",
     "readable-stream": "2.3.6",
-    "safe-buffer": "^5.1.2",
     "stream-to-pull-stream": "^1.7.2",
     "tar-stream": "^1.6.0",
     "temp": "~0.8.3",