Bumped version to v0.3.1, added CHANGELOG entry

CHANGELOG.md

@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
+## [0.3.1] - 2018-05-28
+- Added two alias functions ``activeOnBlock()`` and ``gteHardfork()`` when hardfork is set for convenience, PR [#15](https://github.com/ethereumjs/ethereumjs-common/pull/15)
+- Added option to dynamically choose genesis state (see ``README``), PR [#15](https://github.com/ethereumjs/ethereumjs-common/pull/15)
+
+[0.3.1]: https://github.com/ethereumjs/ethereumjs-common/compare/v0.3.0...v0.3.1
+
 ## [0.3.0] - 2018-05-25
 - Allow functions like ``hardforkIsActiveOnBlock()`` - where hardfork is provided as param - also to be run on hardfork set for greater flexibility/comfort, PR [#13](https://github.com/ethereumjs/ethereumjs-common/pull/13)
 - New ``hardforkGteHardfork()`` method for HF order comparisons, PR [#13](https://github.com/ethereumjs/ethereumjs-common/pull/13)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ethereumjs-common",
-  "version": "0.3.0",
+  "version": "0.3.1",
   "description": "Resources common to all Ethereum implementations",
   "main": "index.js",
   "scripts": {