Update Gemfile

.travis.yml

@@ -3,7 +3,9 @@ sudo: required
 dist: trusty
 rvm:
   - 2.6.4
-before_install: gem install bundler -v 1.16.0
+before_install: 
+  - gem install bundler
+  - bundle update
 before_script:
   - cp config/application.yml.example config/application.yml
   - cp config/database.yml.example config/database.yml

Dockerfile

@@ -8,4 +8,4 @@ ADD Gemfile /app/Gemfile
 ADD Gemfile.lock /app/Gemfile.lock
 
 RUN bundle install
-ADD . /app
+ADD . /app

Gemfile

@@ -34,7 +34,7 @@ gem 'modernizr-rails'
 gem 'nokogiri', '>= 1.10.4'
 gem 'pg'
 gem 'pdfkit'
-gem 'rails', '5.2.2.1'
+gem 'rails', '6.0'
 gem 'rails-i18n'
 gem 'rails-env'
 gem 'rack', '>= 2.0.6'
@@ -49,6 +49,7 @@ gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 gem 'uglifier'
 gem 'wkhtmltopdf-binary'
 gem 'whenever', require: false
+gem 'rubocop'
 
 group :development, :test do
   gem 'byebug', platform: :mri