Retry phpunit and phpcs once if they failed

tests/lakedrops.yml

@@ -28,6 +28,7 @@ Test Code Style:
   <<: *test_lakedrops_default
   script:
     - ahoy test phpcs
+  retry: 1
   artifacts:
     name: phpcs
     when: always
@@ -42,6 +43,7 @@ Test PHPUnit:
   <<: *test_lakedrops_default
   script:
     - ahoy test phpunit -- --log-junit /tmp/logs/junit.xml --testdox-html /tmp/logs/testdox.html
+  retry: 1
   artifacts:
     name: phpunit
     when: always