Bump Ruby 2.3.1

.ruby-version

@@ -1 +1 @@
-2.3.0
+2.3.1

Dockerfile

@@ -1,5 +1,5 @@
 
-FROM ruby:2.3.0
+FROM ruby:2.3.1
 MAINTAINER Conor Heine <conor.heine@gmail.com>
 
 RUN apt-get update

Gemfile

@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
-ruby '2.3.0'
+ruby '2.3.1'
 
 gem 'rake'
 gem 'thor'

Gemfile.lock

@@ -129,5 +129,8 @@ DEPENDENCIES
   unix_utils
   yajl-ruby
 
+RUBY VERSION
+   ruby 2.3.1p112
+
 BUNDLED WITH
-   1.11.2
+   1.13.2

README.md

@@ -20,7 +20,7 @@ Unless you wish to contribute to the project, I recommend using the hosted versi
 
 DevDocs is made of two pieces: a Ruby scraper that generates the documentation and metadata, and a JavaScript app powered by a small Sinatra app.
 
-DevDocs requires Ruby 2.3.0, libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/rails/execjs#readme) (included in OS X and Windows; [Node.js](https://nodejs.org/en/) on Linux). Once you have these installed, run the following commands:
+DevDocs requires Ruby 2.3.1, libcurl, and a JavaScript runtime supported by [ExecJS](https://github.com/rails/execjs#readme) (included in OS X and Windows; [Node.js](https://nodejs.org/en/) on Linux). Once you have these installed, run the following commands:
 
 ```
 git clone https://github.com/Thibaut/devdocs.git && cd devdocs