chore: update dependencies to enable Greenkeeper 🌴 (#463)

* chore(package): update dependencies

* docs(readme): add Greenkeeper badge

* chore: dep pins

License: MIT
Signed-off-by: Alan Shaw <alan.shaw@protocol.ai>

package.json

@@ -37,26 +37,26 @@
   "homepage": "https://github.com/ipfs/interface-ipfs-core#readme",
   "dependencies": {
     "async": "^2.6.1",
-    "bl": "^2.1.2",
+    "bl": "^3.0.0",
     "bs58": "^4.0.1",
     "chai": "^4.2.0",
-    "cids": "~0.5.5",
+    "cids": "~0.5.8",
     "concat-stream": "^2.0.0",
     "dirty-chai": "^2.0.1",
     "es6-promisify": "^6.0.1",
     "hat": "0.0.3",
-    "into-stream": "^4.0.0",
+    "into-stream": "^5.1.0",
     "ipfs-block": "~0.8.0",
     "ipfs-unixfs": "~0.1.16",
     "ipld-dag-cbor": "~0.13.1",
-    "ipld-dag-pb": "~0.15.0",
-    "is-ipfs": "~0.5.1",
-    "is-plain-object": "^2.0.4",
+    "ipld-dag-pb": "~0.15.3",
+    "is-ipfs": "~0.6.0",
+    "is-plain-object": "^3.0.0",
     "libp2p-crypto": "~0.16.0",
     "multiaddr": "^6.0.0",
     "multibase": "~0.6.0",
     "multihashes": "~0.4.14",
-    "multihashing-async": "~0.5.1",
+    "multihashing-async": "~0.6.0",
     "peer-id": "~0.12.0",
     "peer-info": "~0.15.0",
     "pull-stream": "^3.6.9",