Do not raise error for valid build_stubbed methods

decrement, increment, and toggle do not persist the toggled values, so
there is not reason to disable those methods.

Co-authored-by: Alex Tsui <alextsui05@gmail.com>

lib/factory_bot/strategy/stub.rb

@@ -6,17 +6,14 @@ module FactoryBot
       DISABLED_PERSISTENCE_METHODS = [
         :connection,
         :decrement!,
-        :decrement,
         :delete,
         :destroy!,
         :destroy,
         :increment!,
-        :increment,
         :reload,
         :save!,
         :save,
         :toggle!,
-        :toggle,
         :touch,
         :update!,
         :update,

spec/acceptance/build_stubbed_spec.rb

@@ -7,7 +7,8 @@ describe "a generated stub instance" do
     define_model('Post', title:   :string,
                          body:    :string,
                          age:     :integer,
-                         user_id: :integer) do
+                         user_id: :integer,
+                         draft: :boolean) do
       belongs_to :user
     end
 
@@ -77,13 +78,35 @@ describe "a generated stub instance" do
     expect { subject.save }.to raise_error(RuntimeError)
   end
 
-  it "disables increment" do
+  it "disables increment!" do
     expect { subject.increment!(:age) }.to raise_error(RuntimeError)
   end
 
-  it "disables decrement" do
+  it "disables decrement!" do
     expect { subject.decrement!(:age) }.to raise_error(RuntimeError)
   end
+
+  it "disables toggle!" do
+    expect { subject.toggle!(:draft) }.to raise_error(RuntimeError)
+  end
+
+  it "allows increment" do
+    subject.age = 1
+    subject.increment(:age)
+    expect(subject.age).to eq(2)
+  end
+
+  it "allows decrement" do
+    subject.age = 1
+    subject.decrement(:age)
+    expect(subject.age).to eq(0)
+  end
+
+  it "allows toggle" do
+    subject.draft = true
+    subject.toggle(:draft)
+    expect(subject).not_to be_draft
+  end
 end
 
 describe "calling `build_stubbed` with a block" do

spec/factory_bot/strategy/stub_spec.rb

@@ -48,17 +48,14 @@ describe FactoryBot::Strategy::Stub do
     end
 
     include_examples "disabled persistence method", :connection
-    include_examples "disabled persistence method", :decrement
     include_examples "disabled persistence method", :decrement!
     include_examples "disabled persistence method", :delete
     include_examples "disabled persistence method", :destroy
     include_examples "disabled persistence method", :destroy!
-    include_examples "disabled persistence method", :increment
     include_examples "disabled persistence method", :increment!
     include_examples "disabled persistence method", :reload
     include_examples "disabled persistence method", :save
     include_examples "disabled persistence method", :save!
-    include_examples "disabled persistence method", :toggle
     include_examples "disabled persistence method", :toggle!
     include_examples "disabled persistence method", :touch
     include_examples "disabled persistence method", :update