travis: Remove deprecated `sudo` option, set default OS

Also replaces `matrix` with the current official name `jobs`.

diff --git a/.travis.yml b/.travis.yml
index a5cde8a597087b0f0619e9daa71979b5c3af2c97..c4df152570c2a69f9fab06b1e425f9174cfb2521 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: c
 
-sudo: required
+os: linux
 dist: bionic
 
 # don't build tags separately
@@ -35,7 +35,7 @@ env:
     - LEAK_DETECTIVE=no
     - MONOLITHIC=no
 
-matrix:
+jobs:
   include:
     - env: TEST=sonarcloud
       if: type = push AND env(SONAR_TOKEN) IS present