Bump to v0.5.0.beta2 [ci skip]
Bump to v0.5.0.beta2 [ci skip]

matrinox/appsignal-ruby,stijnster/appsignal-ruby,stijnster/appsignal-ruby,matrinox/appsignal-ruby,codefarmdev/haystack,appsignal/appsignal-ruby,appsignal/appsignal,rranelli/appsignal,appsignal/appsignal,appsignal/appsignal-ruby,q-m/appsignal,appsignal/appsignal-ruby,subvisual/appsignal,matrinox/appsignal-ruby,appsignal/appsignal-ruby,stijnster/appsignal-ruby