ruby 2.5 is minimum, switch to github actions

.github/workflows/build.yml

+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
+
+name: build
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - 3.0
+          - 2.7
+          - 2.6
+          - 2.5
+          - jruby-9.2.8.0
+        env:
+          - RAILS='~> 4.2.0' SQLITE_VERSION='~> 1.3.6'
+          - RAILS='~> 5.0.0' SQLITE_VERSION='~> 1.3.6'
+          - RAILS='~> 5.1.0'
+          - RAILS='~> 5.2.0'
+          - RAILS='~> 6.1.0'
+          - RAILS='~> 7.0.0.alpha2'
+          - RAILS='edge'
+        exclude:
+        # Rails edge is now 7.x and requires ruby 2.7
+        - env: RAILS='edge'
+          ruby: 2.6
+        - env: RAILS='edge'
+          ruby: 2.5
+
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - run: bundle exec rake

.travis.yml

-sudo: false
-language: ruby
-before_install:
-  - gem query -I -n "^bundler$" -v ">=2" || gem uninstall -x bundler -v ">=2" || rvm @global do gem uninstall -x bundler -v ">=2"
-  - gem query -i -n "^bundler$" -v "<2" || gem install bundler -v "<2"
-cache: bundler
-rvm:
-  - 2.3.8
-  - 2.4.5
-  - 2.5.3
-  - 2.6.3
-  - jruby-9.2.8.0
-
-env:
-  matrix:
-    - RAILS='~> 4.2.0' SQLITE_VERSION='~> 1.3.6'
-    - RAILS='~> 5.0.0' SQLITE_VERSION='~> 1.3.6'
-    - RAILS='~> 5.1.0'
-    - RAILS='~> 5.2.0'
-    - RAILS='~> 6.1.0'
-    - RAILS='master'
-
-matrix:
-  allow_failures:
-    - env: RAILS='~> 4.2.0' SQLITE_VERSION='~> 1.3.6'
-      rvm: jruby-9.2.8.0
-    - env: RAILS='~> 5.0.0' SQLITE_VERSION='~> 1.3.6'
-      rvm: jruby-9.2.8.0
-    - env: RAILS='~> 5.1.0'
-      rvm: jruby-9.2.8.0
-    - env: RAILS='~> 5.2.0'
-      rvm: jruby-9.2.8.0
-    - env: RAILS='master'
-      rvm: jruby-9.2.8.0
-    - env: RAILS='~> 6.1.0'
-      rvm: jruby-9.2.8.0
-  exclude:
-    - rvm: 2.3.8
-      env: RAILS='master'
-    - rvm: 2.4.5
-      env: RAILS='master'
-    - rvm: 2.3.8
-      env: RAILS='~> 6.1.0'
-    - rvm: 2.4.5
-      env: RAILS='~> 6.1.0'

Gemfile

@@ -20,7 +20,7 @@ end
 
 rails = ENV['RAILS'] || '~> 5.2.0'
 
-if rails == 'master'
+if rails == 'edge'
   gem 'rails', github: 'rails/rails'
 else
   gem 'rails', rails

paranoia.gemspec

@@ -11,7 +11,7 @@ Gem::Specification.new do |s|
   s.license     = 'MIT'
   s.summary     = "Paranoia is a re-implementation of acts_as_paranoid for Rails 3, 4, and 5, using much, much, much less code."
   s.description = <<-DSC
-    Paranoia is a re-implementation of acts_as_paranoid for Rails 4, 5, and 6,
+    Paranoia is a re-implementation of acts_as_paranoid for Rails 4, 5, 6, and 7,
     using much, much, much less code. You would use either plugin / gem if you
     wished that when you called destroy on an Active Record object that it
     didn't actually destroy it, but just "hid" the record. Paranoia does this
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = ">= 1.3.6"
 
-  s.required_ruby_version = '>= 2.0'
+  s.required_ruby_version = '>= 2.5'
 
   s.add_dependency 'activerecord', '>= 4.0', '< 7.1'