Fix #1927 string * float error in leafo/lessphp

- dev-master 태그로 업데이트
- PHP 8.0 이상 버전에서 오류를 일으키는 {0} 문법 4군데 재수정

vendor/leafo/lessphp/.travis.yml

@@ -1,17 +1,17 @@
 language: php
 
 php:
-  - 5.3
-  - 5.4
-  - 5.5
+  - 5.6
   - hhvm
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
 
-before_script:
-  - composer self-update
-  - composer install --no-interaction --prefer-source --dev
+sudo: false
+
+install:
+  - travis_retry composer install --no-interaction --prefer-source
 
 script:
-  - phpunit tests
-
-matrix:
-  fast_finish: true
+  - composer test