Add #notify and return a future

lib/telebugs.rb

@@ -11,5 +11,10 @@ class << self
     def configure
       yield Telebugs::Config.instance
     end
+
+    def notify(error:)
+      Concurrent::Promises.future do
+      end
+    end
   end
 end

telebugs.gemspec

@@ -32,8 +32,7 @@ Gem::Specification.new do |spec|
   spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  # Uncomment to register a new dependency of your gem
-  # spec.add_dependency "example-gem", "~> 1.0"
+  spec.add_dependency "concurrent-ruby", "~> 1.3"
 
   # For more information and examples about making a new gem, check out our
   # guide at: https://bundler.io/guides/creating_gem.html

test/test_telebugs.rb

@@ -16,4 +16,10 @@ def test_configure_configures_project_key
 
     assert_equal key, Telebugs::Config.instance.api_key
   end
+
+  def test_notify_returns_a_future
+    future = Telebugs.notify(error: StandardError.new)
+
+    assert_instance_of Concurrent::Promises::Future, future
+  end
 end