Use bionic instead of trusty.

meisterT · meisterT · commit 7bbebaaabcb6 · 2019-10-20T19:45:28.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,4 @@
-dist: trusty
+dist: bionic
 sudo: required
 addons:
   apt:
