Adds support for ruby 3.0 pattern matching (#200)

Adds support for ruby 3.0 pattern matching

lib/interactor/context.rb

@@ -181,5 +181,32 @@ def rollback!
     def _called
       @called ||= []
     end
+
+    # Internal: Support for ruby 3.0 pattern matching
+    #
+    # Examples
+    #
+    #   context = MyInteractor.call(foo: "bar")
+    #
+    #   # => #<Interactor::Context foo="bar">
+    #   context => { foo: }
+    #   foo == "bar"
+    #   # => true
+    #
+    #
+    #   case context
+    #   in success: true, result: { first:, second: }
+    #     do_stuff(first, second)
+    #   in failure: true, error_message:
+    #     log_error(message: error_message)
+    #   end
+    #
+    # Returns the context as a hash, including success and failure
+    def deconstruct_keys(keys)
+      to_h.merge(
+        success: success?,
+        failure: failure?
+      )
+    end
   end
 end

spec/interactor/context_spec.rb

@@ -199,5 +199,20 @@ module Interactor
         expect(context._called).to eq([])
       end
     end
+
+    describe '#deconstruct_keys' do
+      let(:context) { Context.build(foo: :bar) }
+
+      let(:deconstructed) { context.deconstruct_keys([:foo, :success, :failure]) }
+
+      it 'deconstructs as hash pattern' do
+        expect(deconstructed[:foo]).to eq(:bar)
+      end
+
+      it 'includes success and failure' do
+        expect(deconstructed[:success]).to eq(true)
+        expect(deconstructed[:failure]).to eq(false)
+      end
+    end
   end
 end