Upgrade travis to Ubuntu 18.04 (Bionic)

This might address #40 by installing a more recent version of pandoc than 2.2.1. that doesn't have a bug in `pandoc.utils.stringify()`.
ukgovdatascience · Oct 23, 2019 · b9bdecb · b9bdecb
1 parent 2c556b4
commit b9bdecb
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -1,3 +1,4 @@
+dist: bionic
 language: R
 cache: packages
 r: