tree 1f64d08ddab3ae61bc566544b7a12dd665608206
parent f09816e8e56c210dab1dc78fd5d2152805610e0c
author Davide Pesavento <davidepesa@gmail.com> 1569471794 -0400
committer Davide Pesavento <davidepesa@gmail.com> 1569473706 -0400

ci: upgrade Travis config to Ubuntu 18.04

Also in this commit:

 * Drop clang 3.8 (no easy way to install it on 18.04)
 * Add clang 10 (trunk)
 * Drop Xcode 8.3
 * Upgrade Xcode 10.2 to 10.3
 * Add Xcode 11

Change-Id: Ib845d45f7d86d1f8302786618b516b2534875e4e