README: bump OpenRPC version

Rel ethereum#32

Author: meowsbits

README.md

@@ -2,7 +2,7 @@
 
 > A "swiss army knife" distribution of _go-ethereum_, with support for many species of Ethereum networks.
 
-[![OpenRPC](https://img.shields.io/static/v1.svg?label=OpenRPC&message=1.1.8&color=blue)](#openrpc-discovery)
+[![OpenRPC](https://img.shields.io/static/v1.svg?label=OpenRPC&message=1.10.0&color=blue)](#openrpc-discovery)
 [![API Reference](
 https://assets-git-camo.f3mw1.com/915b7be44ada53c290eb157634330494ebe3e30a/68747470733a2f2f676f646f632e6f72672f6769746875622e636f6d2f676f6c616e672f6764646f3f7374617475732e737667
 )](https://godoc.org/github.com/multi-geth/multi-geth)