Configure Travis builds for branches and PRs (#67)
Configure Travis builds for branches and PRs (#67)

Only build master and develop branches when pushed. When a PR is made on
GitHub travis will start a build as well.
appsignal/appsignal-elixir,appsignal/appsignal-elixir,appsignal/appsignal-elixir,appsignal/appsignal-elixir