chore(release): 2.0.1-beta.6 [skip ci]

## [2.0.1-beta.6](https://github.com/PolymathNetwork/polymath-sdk/compare/[email protected]@beta) (2019-05-14)

### Bug Fixes

* attempt to estimate gas for token reservation ([a50147e](a50147e))
* fix conflict ([9dae41b](9dae41b))
* refactor remaining transactions ([bd0f3b4](bd0f3b4))
* replace any with void ([65f4811](65f4811))

### Features

* change wrapper gas estimation function into a utility one ([c1990d1](c1990d1))

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@polymathnetwork/sdk",
-  "version": "2.0.1-beta.5",
+  "version": "2.0.1-beta.6",
   "description": "A Javascript SDK for interacting with the Polymath network for the browser and Node.js",
   "bugs": {
     "url": "https://github.com/PolymathNetwork/polymath-sdk/issues"