tree cad34a03e4e9325b17a92dd227f3505b482bb1b3
parent bc2d412394baf98072ec2db9de8152b6f9512424
author Davide Pesavento <davidepesa@gmail.com> 1569537049 -0400
committer Davide Pesavento <davidepesa@gmail.com> 1569537049 -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: Ibd8f3ea4c577f4873ae05553d508ab4967d59beb