[ci] update composer to version 2 to pass scrutinizer ci successfully

Signed-off-by: Vitalii Koshura <lestat.de.lionkur@gmail.com>

Author: AenBleidd

.scrutinizer.yml

@@ -1,10 +1,16 @@
 build:
     environment:
-        php: 7.2.0
+        php: 7.2.5
     nodes:
         analysis:
             dependencies:
                 before:
+                    - mkdir -p $HOME/bin
+                    - curl -sS https://getcomposer.org/composer-2.phar -o $HOME/bin/composer
+                    - chmod +x $HOME/bin/composer
+                    - export PATH=$HOME/bin:$PATH
+                    - composer --version
+                    - composer global require squizlabs/php_codesniffer
                     - command: 'mkdir -p 3rdParty/buildCache && wget https://ftp.drupal.org/files/projects/drupal-6.38.tar.gz -O drupal-6.38.tar.gz && tar -C 3rdParty/buildCache/ -xzf drupal-6.38.tar.gz'
                       not_if: 'test -e 3rdParty/buildCache/drupal-6.38'
             cache:
@@ -30,6 +36,7 @@ filter:
         - 'drupal/sites/default/modules/boinc/*'
         - 'drupal/sites/default/themes/boinc/*'
         - 'tests/server-test/*'
+        - '3rdParty/buildCache/drupal-6.38/*'
     dependency_paths:
         - 'html/inc/htmLawed.php'
         - 'drupal/sites/all/libraries/*'