Move tests cache

Author: neznaika0

.gitignore

@@ -125,6 +125,5 @@ nb-configuration.xml
 
 /results/
 /phpunit*.xml
-/.phpunit.*.cache
 
 /.php-cs-fixer.php

phpunit.xml.dist

@@ -12,7 +12,7 @@
     stopOnFailure="false"
     stopOnIncomplete="false"
     stopOnSkipped="false"
-    cacheDirectory=".phpunit.cache"
+    cacheDirectory="build/.phpunit.cache"
     beStrictAboutCoverageMetadata="true">
     <coverage includeUncoveredFiles="true">
         <report>