Add Rails 7.0 to Appraisal's gemfiles

gemfiles/rails70.gemfile

@@ -0,0 +1,49 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "administrate-field-image"
+gem "faker"
+gem "front_matter_parser"
+gem "globalid"
+gem "kaminari-i18n"
+gem "pg"
+gem "pundit"
+gem "redcarpet"
+gem "sentry-raven"
+gem "unicorn"
+gem "rails", "~> 6.1"
+
+group :development, :test do
+  gem "appraisal"
+  gem "awesome_print"
+  gem "bundler-audit", require: false
+  gem "byebug"
+  gem "dotenv-rails"
+  gem "factory_bot_rails"
+  gem "i18n-tasks", "0.9.37"
+  gem "pry-rails"
+  gem "yard"
+end
+
+group :test do
+  gem "ammeter"
+  gem "capybara"
+  gem "database_cleaner"
+  gem "formulaic"
+  gem "launchy"
+  gem "selenium-webdriver"
+  gem "shoulda-matchers"
+  gem "timecop"
+  gem "webdrivers"
+  gem "webmock"
+  gem "webrick"
+  gem "xpath", "3.2.0"
+end
+
+group :staging, :production do
+  gem "rack-timeout"
+  gem "uglifier"
+end
+
+gemspec path: "../"