Updated ethereumjs-block dependency and ethereumjs-blockchain dev dependency to Constantinople-ready versions

Author: holgerd77

package.json

@@ -38,7 +38,7 @@
     "async": "^2.1.2",
     "async-eventemitter": "^0.2.2",
     "ethereumjs-account": "^2.0.3",
-    "ethereumjs-block": "~2.0.1",
+    "ethereumjs-block": "~2.1.0",
     "ethereumjs-common": "^0.6.0",
     "ethereumjs-util": "^6.0.0",
     "fake-merkle-patricia-tree": "^1.0.1",
@@ -51,7 +51,7 @@
     "babel-cli": "^6.26.0",
     "babel-preset-env": "^1.6.1",
     "coveralls": "^3.0.0",
-    "ethereumjs-blockchain": "~3.2.1",
+    "ethereumjs-blockchain": "~3.3.0",
     "ethereumjs-testing": "git+https://github.com/ethereumjs/ethereumjs-testing.git#v1.2.4",
     "ethereumjs-tx": "1.3.3",
     "level": "^1.4.0",