Upgrade ruby to 2.5.2

.ruby-version

@@ -1 +1 @@
-2.5.1
+2.5.2

.travis.yml

@@ -1,6 +1,6 @@
 language: ruby
 rvm:
-  - "2.5.1"
+  - "2.5.2"
 
 before_install:
   - "gem install bundler"

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.5.1
+FROM ruby:2.5.2
 RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs
 RUN mkdir /myapp
 WORKDIR /myapp

Gemfile

@@ -4,7 +4,7 @@ source "https://rubygems.org"
 #don't upgrade
 gem "rails", "5.1.6"
 
-ruby "2.5.1"
+ruby "2.5.2"
 
 gem "aruba"
 gem "bcrypt"

Gemfile.lock

@@ -374,7 +374,7 @@ DEPENDENCIES
   unicorn
 
 RUBY VERSION
-   ruby 2.5.1p57
+   ruby 2.5.2p104
 
 BUNDLED WITH
    1.17.0.pre.2