Run unit tests against PHP 8.1.

brentscheffler · brentscheffler · commit 7a6e036eac2f · 2022-04-27T12:16:14.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,6 +3,7 @@ php:
   - '7.3'
   - '7.4'
   - '8.0'
+  - '8.1'
 
 install:
   - composer install
