update the Travis config to focal (20.04) and newer rvm (#870)

bashbaug · web-flow · commit 1aedda7a3429 · 2023-01-17T17:12:40.000Z
diff --git a/.travis.yml b/.travis.yml
@@ -1,12 +1,12 @@
-dist: xenial
+dist: focal
 
 language: ruby
 
 git:
   depth: 200
 
 rvm:
-  - 2.3.3
+  - 2.7.1
 
 before_install:
   - sudo apt-get install -y libpango1.0-dev ghostscript fonts-lyx jing
