use dist:bionic = ubuntu 18.04

erossignon · erossignon · commit be5b4cf23c24 · 2020-08-15T12:16:07.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -43,8 +43,8 @@ matrix:
     - os: osx
 addons:
   apt:
-    sources:
-    - ubuntu-toolchain-r-test
+    # sources:
+    # - ubuntu-toolchain-r-test
     packages:
     - g++
     - libtbb2
