drop ar 5_2

Appraisals

@@ -1,12 +1,8 @@
-%w(5.2.4.5 6.0.3.6 6.1.3.1).each do |ar_version|
+%w(6.0.3.6 6.1.3.1).each do |ar_version|
   appraise "gemfile-#{ar_version.split('.').first(2).join}" do
     gem "activerecord", ar_version
     gem "pg"
     gem "mysql2"
-    if ar_version < "5.2"
-      gem "sqlite3", "~> 1.3.13"
-    else
-      gem "sqlite3"
-    end
+    gem "sqlite3"
   end
 end

Gemfile

@@ -2,7 +2,7 @@ source 'https://rubygems.org'
 
 gemspec
 
-gem "activerecord", '~> 5.2.4.5'
+gem "activerecord", '~> 6.0.3.6'
 gem "coveralls", require: false
 gem "mysql2"
 gem "pg"

README.md

@@ -16,7 +16,7 @@ NOTE:
 
 - Ancestry 2.x supports Rails 4.1 and earlier
 - Ancestry 3.x supports Rails 5.0 and 4.2
-- Ancestry 4.0 only supports rails 5.0 and higher
+- Ancestry 4.x only supports rails 6.0 and higher
 
 # Installation
 
@@ -132,8 +132,8 @@ The has_ancestry method supports the following options:
                            By default, primary keys only match integers ([0-9]+)
     :touch                 Instruct Ancestry to touch the ancestors of a node when it changes, to
                            invalidate nested key-based caches. (default: false)
-    :counter_cache         Boolean whether to create counter cache column accessor. 
-                           Default column name is `children_count`. 
+    :counter_cache         Boolean whether to create counter cache column accessor.
+                           Default column name is `children_count`.
                            Pass symbol to use different column name (default: false)
 
 # (Named) Scopes

ancestry.gemspec

@@ -39,7 +39,7 @@ EOF
   s.require_paths = ["lib"]
 
   s.required_ruby_version     = '>= 2.0.0'
-  s.add_runtime_dependency 'activerecord', '>= 5.2.4.5'
+  s.add_runtime_dependency 'activerecord', '>= 6.0.3.6'
   s.add_development_dependency 'appraisal'
   s.add_development_dependency 'minitest'
   s.add_development_dependency 'rake',      '~> 13.0'