Implement config serialisation

lib/kangaru/config.rb

@@ -6,6 +6,10 @@ def initialize
       @configurators = set_configurators!
     end
 
+    def serialise
+      configurators.transform_values(&:serialise)
+    end
+
     private
 
     def set_configurators!

sig/kangaru/config.rbs

@@ -6,6 +6,8 @@ module Kangaru
 
     def initialize: -> void
 
+    def serialise: -> Hash[Symbol, Hash[Symbol, untyped]]
+
     private
 
     def set_configurators!: -> Hash[Symbol, configurator]

spec/kangaru/config_spec.rb

@@ -64,4 +64,24 @@
       end
     end
   end
+
+  describe "#serialise" do
+    subject(:hash) { config.serialise }
+
+    context "when no configurators defined" do
+      include_context :no_configurators_defined
+
+      it "returns an empty hash" do
+        expect(hash).to be_empty
+      end
+    end
+
+    context "when configurators set" do
+      include_context :configurator_defined
+
+      it "returns the expected hash" do
+        expect(hash).to eq(foobar: { hello: "world" })
+      end
+    end
+  end
 end