Use newer version of os-x compiler. 7/head
authorRobert Bradshaw <robertwb@gmail.com>
Fri, 22 Feb 2019 09:14:55 +0000 (10:14 +0100)
committerGitHub <noreply@github.com>
Fri, 22 Feb 2019 09:14:55 +0000 (10:14 +0100)
commita48cd9e99ca9ff2c660e7fdcd9ce23602e823769
tree4046e44bb5b9223ff0c270bb9bf2d0533258177d
parent8b8bdda28cc4d92797a202ea251287bc43048d8a
Use newer version of os-x compiler.

There is a warning that xcode6.4 is going away.
.travis.yml