message: Clarify needed settings for pre-built binaries.
  Closes
  I think it would be great if tarpaulin had CI itself to verify that all
  recommended installation procedures actually lead to working setups.
  Unfortunately I don't have the time to set that up for you.
diff: @@ -277,6 +277,16 @@ release built on travis to your travis instance and significantly speeds up the
  builds. You can install via that script using
  `bash <(curl https://raw.githubusercontent.com/xd009642/tarpaulin/master/travis-install.sh)`.
  +The prebuilt binary doesn't work on xenial or trusty, but it works on bionic. You must install the
  +`libssl-dev` package:
  +```yaml
  +dist: bionic
  +
  +apt:
  + packages:
  + - libssl-dev
  +```
  +
  ### CircleCI
  To run tarpaulin on CircleCI you need to run tarpaulin in docker and set the
  