chore: upgrade to Rails 6.1 and Ruby 2.7

.github/workflows/system_test.yml

@@ -41,8 +41,8 @@ jobs:
             bundle-
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.6.5
-      - name: Install PostgreSQL 11 client
+          ruby-version: 2.7.2
+      - name: Install PostgreSQL client
         run: |
           sudo apt-get -yqq install libpq-dev
       - name: Bundle install

.github/workflows/unit_test.yml

@@ -19,6 +19,8 @@ jobs:
       postgres:
         image: postgres:11.1
         ports: ["5432:5432"]
+        env:
+          POSTGRES_PASSWORD: postgres
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
       redis:
         image: redis:5.0-alpine
@@ -34,8 +36,8 @@ jobs:
             bundle-
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.6.5
-      - name: Install PostgreSQL 11 client
+          ruby-version: 2.7.2
+      - name: Install PostgreSQL client
         run: |
           sudo apt-get -yqq install libpq-dev
       - name: Bundle install

.ruby-version

@@ -1 +1 @@
-ruby-2.6.5
+ruby-2.7.2

Gemfile

@@ -1,9 +1,9 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.6.5'
+ruby '2.7.2'
 
-gem 'rails', '~> 6.0.2', '>= 6.0.2.2'
+gem 'rails', '~> 6.1'
 gem 'webpacker', '~> 4.0'
 gem 'pg', '~> 1.0'
 gem 'puma', '~> 4.1'
@@ -32,9 +32,6 @@ end
 
 group :test do
   gem 'capybara'
-  # Rails system tests couldn't run without it, event though we don't use it
-  # https://github.com/rails/rails/pull/39179
-  gem 'selenium-webdriver'
   gem 'cuprite'
 
   gem 'test-prof'