travis: update composer to the latest snapshot

Fixes our build
rebing · Apr 23, 2020 · c3b4a38 · c3b4a38
1 parent e651466
commit c3b4a38
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -45,6 +45,7 @@ before_script:
   - phpenv config-rm xdebug.ini || true
 
 install:
+  - composer self-update --snapshot
   - |
     # Due to version incompatiblity with older Laravels we test, we remove it
     composer remove --dev matt-allan/laravel-code-style --no-interaction --no-update