[Heimdal-source-changes] [heimdal/heimdal] d28804: Fix Coveralls badge to master branch

[Nico Williams]

  Branch: refs/heads/master
  Home:   https://github.com/heimdal/heimdal
  Commit: d2880425e559b0babedd525765c0dae98bf24aca
      https://github.com/heimdal/heimdal/commit/d2880425e559b0babedd525765c0dae98bf24aca
  Author: Nicolas Williams <nico at twosigma.com>
  Date:   2020-04-14 (Tue, 14 Apr 2020)

  Changed paths:
    M README.md

  Log Message:
  -----------
  Fix Coveralls badge to master branch