Bump to v1.3.6 [ci skip]
Bump to v1.3.6 [ci skip]

appsignal/appsignal,matrinox/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal,appsignal/appsignal-ruby,matrinox/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal-ruby