Fix Travis configuration

Changes:
- Remove PHP 5.5
- Support PHPUnit 5.7
- Fix Coveralls

.travis.yml

@@ -2,7 +2,6 @@ sudo: false
 
 language: php
 php:
-  - 5.5
   - 5.6
   - 7.0
   - 7.1
@@ -12,7 +11,7 @@ php:
 matrix:
   fast_finish: true
   allow_failures:
-    - php: 5.5
+    - php: 5.6
     - php: nightly
 
 branches:
@@ -30,4 +29,4 @@ before_script:
 script: composer test
 
 after_script:
-  - if [[ "$TRAVIS_PHP_VERSION" == '5.6' ]]; then php vendor/bin/coveralls -v ; fi
+  - if [[ "$TRAVIS_PHP_VERSION" == '7.1' ]]; then php vendor/bin/php-coveralls -v ; fi

composer.json

@@ -15,7 +15,7 @@
     "require-dev": {
         "composer/composer": "^1.0",
         "php-coveralls/php-coveralls": "^2.0",
-        "phpunit/phpunit": "^6.5",
+        "phpunit/phpunit": "^5.7 || ^6.5",
         "squizlabs/php_codesniffer": "^3.0"
     },
     "autoload": {

src/ExcludeFilePlugin.php

@@ -167,7 +167,7 @@ private function getExcludedFiles(PackageInterface $package)
      * @param  string   $vendorDir  The directory for installed dependencies.
      * @return array    Retuns the list of excluded files, prepended with the vendor directory.
      */
-    private function parseExcludedFiles(array $paths, string $vendorDir)
+    private function parseExcludedFiles(array $paths, $vendorDir)
     {
         foreach ($paths as &$path) {
             $path = $vendorDir . '/' . $path;