Use versioned release of sensiolabs/security-checker for PHP 5 compat…

…ibility

.travis.yml

@@ -44,7 +44,7 @@ before_install:
 
 install:
   - '[[ -f "${HOME}/bin/phpcs.phar" ]] || curl -L -o "${HOME}/bin/phpcs.phar" https://squizlabs.github.io/PHP_CodeSniffer/phpcs.phar'
-  - '[[ -f "${HOME}/bin/security-checker.phar" ]] || curl -L -o "${HOME}/bin/security-checker.phar" http://get.sensiolabs.org/security-checker.phar'
+  - '[[ -f "${HOME}/bin/security-checker-v4.1.5.phar" ]] || curl -L -o "${HOME}/bin/security-checker-v4.1.5.phar" http://get.sensiolabs.org/security-checker-v4.1.5.phar'
   - npm install -g jsonlint
 
 script:
@@ -53,4 +53,4 @@ script:
   - php "${HOME}/bin/phpcs.phar" --standard=psr2 src/
   - composer validate
   - travis_wait composer install --no-interaction --no-progress --no-scripts --no-suggest --optimize-autoloader --prefer-dist --verbose
-  - php "${HOME}/bin/security-checker.phar" -n security:check --end-point=http://security.sensiolabs.org/check_lock
+  - php "${HOME}/bin/security-checker-v4.1.5.phar" -n security:check --end-point=http://security.sensiolabs.org/check_lock