Upgrade to Ruby 2.6.10

Pretty smooth one! We also get to finally be on latest Bundler with this!

.ruby-version

@@ -1 +1 @@
-2.4.10
+2.6.10

Gemfile

@@ -1,5 +1,5 @@
 source 'http://rubygems.org'
-ruby '2.4.10'
+ruby '2.6.10'
 
 gem 'rails', '= 5.2.8.1'
 

Gemfile.lock

@@ -295,7 +295,7 @@ DEPENDENCIES
   will_paginate (~> 4.0)
 
 RUBY VERSION
-   ruby 2.4.10p364
+   ruby 2.6.10p210
 
 BUNDLED WITH
-   1.17.3
+   2.4.18

Vagrantfile

@@ -75,7 +75,7 @@ Vagrant.configure("2") do |config|
     apt-get install -y libmysqlclient-dev libcurl4-openssl-dev nodejs
     su vagrant -c 'git clone https://github.com/rbenv/rbenv.git ~/.rbenv'
     su vagrant -c 'git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build'
-    su vagrant -c '~/.rbenv/bin/rbenv install 2.4.10 && ~/.rbenv/shims/gem install bundler -v 1.17.3'
+    su vagrant -c '~/.rbenv/bin/rbenv install 2.6.10 && ~/.rbenv/shims/gem update --system'
     apt-get install -y mysql-server
     mysql -e "CREATE USER IF NOT EXISTS openneo_impress IDENTIFIED BY 'openneo_impress';"
     mysql -e "CREATE DATABASE IF NOT EXISTS openneo_impress;"