RSpec 3.11.0+ distinguishes between hashed and Ruby 3 keywords

This is due to change in RSpec [[1]], which cuases issues such as:

~~~
  1) MultiJson default options sets both load and dump options
     Failure/Error: self.load_options = self.dump_options = value

       MultiJson received :dump_options= with unexpected arguments
         expected: ({:foo=>"bar"})
              got: ({:foo=>"bar"})
     # ./lib/multi_json.rb:15:in `default_options='
     # ./spec/multi_json_spec.rb:171:in `block (4 levels) in <top (required)>'
     # /builddir/build/BUILD/spec/spec_helper.rb:12:in `silence_warnings'
     # ./spec/multi_json_spec.rb:171:in `block (3 levels) in <top (required)>'
~~~

Fixes intridea#203

[1]: rspec/rspec-mocks#1394

spec/multi_json_spec.rb

@@ -166,8 +166,8 @@
     end
 
     it 'sets both load and dump options' do
-      expect(MultiJson).to receive(:dump_options=).with(:foo => 'bar')
-      expect(MultiJson).to receive(:load_options=).with(:foo => 'bar')
+      expect(MultiJson).to receive(:dump_options=).with({:foo => 'bar'})
+      expect(MultiJson).to receive(:load_options=).with({:foo => 'bar'})
       silence_warnings { MultiJson.default_options = {:foo => 'bar'} }
     end
   end

spec/shared/adapter.rb

@@ -19,7 +19,7 @@
       before { MultiJson.dump_options = MultiJson.adapter.dump_options = {} }
 
       after do
-        expect(MultiJson.adapter.instance).to receive(:dump).with(1, :foo => 'bar', :fizz => 'buzz')
+        expect(MultiJson.adapter.instance).to receive(:dump).with(1, {:foo => 'bar', :fizz => 'buzz'})
         MultiJson.dump(1, :fizz => 'buzz')
         MultiJson.dump_options = MultiJson.adapter.dump_options = nil
       end
@@ -100,8 +100,8 @@
     end
 
     it 'passes options to the adapter' do
-      expect(MultiJson.adapter).to receive(:dump).with('foo', :bar => :baz)
-      MultiJson.dump('foo', :bar => :baz)
+      expect(MultiJson.adapter).to receive(:dump).with('foo', {:bar => :baz})
+      MultiJson.dump('foo', {:bar => :baz})
     end
 
     it 'dumps custom objects that implement to_json' do
@@ -128,7 +128,7 @@ def to_json(*)
       before { MultiJson.load_options = MultiJson.adapter.load_options = {} }
 
       after do
-        expect(MultiJson.adapter.instance).to receive(:load).with('1', :foo => 'bar', :fizz => 'buzz')
+        expect(MultiJson.adapter.instance).to receive(:load).with('1', {:foo => 'bar', :fizz => 'buzz'})
         MultiJson.load('1', :fizz => 'buzz')
         MultiJson.load_options = MultiJson.adapter.load_options = nil
       end

spec/shared/json_common_adapter.rb

@@ -15,15 +15,15 @@
     describe 'with :indent option' do
       it 'passes it on dump' do
         object = 'foo'
-        expect(object).to receive(:to_json).with(:indent => "\t")
+        expect(object).to receive(:to_json).with({:indent => "\t"})
         MultiJson.dump(object, :indent => "\t")
       end
     end
   end
 
   describe '.load' do
     it 'passes :quirks_mode option' do
-      expect(::JSON).to receive(:parse).with('[123]', :quirks_mode => false, :create_additions => false)
+      expect(::JSON).to receive(:parse).with('[123]', {:quirks_mode => false, :create_additions => false})
       MultiJson.load('[123]', :quirks_mode => false)
     end
   end