Add support for Ruby 3.1

.travis.yml

@@ -1,6 +1,8 @@
 language: ruby
 cache: bundler
 rvm:
+  - 3.1
+  - 3.0
   - 2.7
   - 2.6
 gemfile:

scim_rails.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
 
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
 
-  s.required_ruby_version = "~> 2.4"
+  s.required_ruby_version = ">= 2.4"
   s.add_dependency "rails", ">= 5.0", "< 6.2"
   s.add_runtime_dependency "jwt", ">= 1.5"
   s.test_files = Dir["spec/**/*"]

spec/dummy/db/schema.rb

@@ -2,32 +2,32 @@
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
 #
-# Note that this schema.rb definition is the authoritative source for your
-# database schema. If you need to create the application database on another
-# system, you should be using db:schema:load, not running all the migrations
-# from scratch. The latter is a flawed and unsustainable approach (the more migrations
-# you'll amass, the slower it'll run and the greater likelihood for issues).
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20181206184313) do
+ActiveRecord::Schema.define(version: 2018_12_06_184313) do
 
   create_table "companies", force: :cascade do |t|
-    t.string   "name",       null: false
-    t.string   "subdomain",  null: false
-    t.string   "api_token",  null: false
+    t.string "name", null: false
+    t.string "subdomain", null: false
+    t.string "api_token", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
   end
 
   create_table "users", force: :cascade do |t|
-    t.string   "first_name",  null: false
-    t.string   "last_name",   null: false
-    t.string   "email",       null: false
-    t.integer  "company_id"
+    t.string "first_name", null: false
+    t.string "last_name", null: false
+    t.string "email", null: false
+    t.integer "company_id"
     t.datetime "archived_at"
-    t.datetime "created_at",  null: false
-    t.datetime "updated_at",  null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
   end
 
 end