Update CI

.travis.yml

@@ -17,18 +17,18 @@ matrix:
       env: COMPOSER=composer.dingo.json
       name: "With Dingo router"
     - php: 7.4.7
+    - php: 8.0
     - php: 7.4
       env: SETUP=lowest
-    - php: 8.0
 
 cache:
   directories:
     - $HOME/.composer/cache
 
 install:
-  - if [[ $SETUP = 'stable' ]]; then travis_retry composer update; fi
+  - if [[ $SETUP = 'stable' ]]; then travis_retry composer install; fi
   - if [[ $SETUP = 'lowest' ]]; then travis_retry composer require laravel/framework:^$LOWEST; composer require laravel/lumen-framework:^$LOWEST; fi
-  - if [[ $SETUP = 'lint' ]]; then composer lint; fi
+  - if [[ $SETUP = 'lint' ]]; then travis_retry composer install; composer lint; fi
 
 script:
   - if [[ $SETUP = 'lint' ]]; then exit 0; fi; composer test-parallel-ci;