Upgraded Ruby versions in config/doc files

.ruby-version

@@ -1 +1 @@
-2.3.1
+2.3.2

.travis.yml

@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - "2.3.1"
+  - "2.3.2"
 before_script: rake db:setup
 before_script: bundle exec rake db:setup
 cache: bundler

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.3.1
+FROM ruby:2.3.2
 RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
 RUN mkdir /myapp
 WORKDIR /myapp

README.md

@@ -11,7 +11,7 @@ If you are looking for support or troubleshooting assistance, please visit our [
 To begin, install the Ruby Version Manager (RVM):
 
 ```bash
-$ curl -L https://get.rvm.io | bash -s stable --autolibs=3 --ruby=2.3.1
+$ curl -L https://get.rvm.io | bash -s stable --autolibs=3 --ruby=2.3.2
 ```
 
 After installing the package, clone this repo: