Allow string for datetime type

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    table_sync (6.9.0)
+    table_sync (6.9.1)
       memery
       rabbit_messaging (>= 1.7.0)
       rails

lib/table_sync/utils/schema/validator/type.rb

@@ -13,7 +13,7 @@ def initialize(display_name, klasses)
 
       # rubocop:disable Layout/ClassStructure
       STRING = new("String", [String]).freeze
-      DATETIME = new("DateTime", [::Sequel::SQLTime, Date, Time, DateTime]).freeze
+      DATETIME = new("DateTime", [String, ::Sequel::SQLTime, Date, Time, DateTime]).freeze
       INTEGER = new("Integer", [Integer]).freeze
       DECIMAL = new("Decimal", [Numeric]).freeze
       BOOLEAN = new("Boolean", [TrueClass, FalseClass]).freeze

lib/table_sync/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module TableSync
-  VERSION = "6.9.0"
+  VERSION = "6.9.1"
 end

spec/receiving/models_spec.rb

@@ -606,7 +606,6 @@
       end
       let(:error) do
         {
-          datetime: "expected DateTime, got: String",
           integer: "expected Integer, got: Float",
           decimal: "expected Decimal, got: String",
           boolean: "expected Boolean, got: String",