Merge branch 'master' into greenkeeper/ethereumjs-util-6.0.0

Author: holgerd77

package.json

@@ -27,7 +27,7 @@
     "async": "^2.6.1",
     "ethashjs": "~0.0.7",
     "ethereumjs-block": "~2.0.1",
-    "ethereumjs-common": "~0.5.0",
+    "ethereumjs-common": "~0.6.0",
     "ethereumjs-util": "~6.0.0",
     "flow-stoplight": "^1.0.0",
     "levelup": "^1.3.2",