remove php 8 for now

Author: jaapio

.travis.yml

@@ -1,13 +1,13 @@
 language: php
-php: [ 7.1, 7.2, 7.3, nightly ]
+php: [ 7.1, 7.2, 7.3, 7.4snapshot ]
 sudo: false
 
 env:
 
 matrix:
   fast_finish: true
   allow_failures:
-    - php: nightly
+    - php: 7.4snapshot
 
 install:
   - travis_retry composer install --no-interaction --prefer-dist --optimize-autoloader