Bump to 0.1.6.rc.1 [ci skip]
Bump to 0.1.6.rc.1 [ci skip]

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