Issue #3426666 allow failure on next major

Closes #3426666

.gitlab-ci.yml

@@ -143,6 +143,7 @@ composer (previous minor):
     - !reference [composer, after_script]
 
 composer (next major):
+  allow_failure: true
   before_script:
     # Remove the one core patch we currently apply. We can do this because it does
     # not affect Package Manager or Automatic Updates at all. We should remove this
@@ -210,7 +211,7 @@ phpunit (previous minor):
     - !reference [phpunit, rules]
 
 phpunit (next major):
-  allow_failure: false
+  allow_failure: true
   parallel:
     matrix:
       - MODULE: