reverted travis config to bionic

SteJaySulli · SteJaySulli · commit 525dce900bdf · 2022-04-05T13:38:55.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,5 @@
 language: php
-distro: focal
+distro: bionic
 php:
   - '7.1'
   - '7.2'
