Update tools

Author: sebastianbergmann

.phive/phars.xml

@@ -3,5 +3,5 @@
   <phar name="php-cs-fixer" version="^2.16" installed="2.16.7" location="./tools/php-cs-fixer" copy="true"/>
   <phar name="psalm" version="^4.0" installed="4.1.1" location="./tools/psalm" copy="true"/>
   <phar name="roave/backwardcompatibilitycheck" version="^5.0.0" installed="5.0.0" location="./tools/roave-backward-compatibility-check" copy="true"/>
-  <phar name="composer" version="^2.0.3" installed="2.0.4" location="./tools/composer" copy="true"/>
+  <phar name="composer" version="^2.0.3" installed="2.0.6" location="./tools/composer" copy="true"/>
 </phive>