Revert "Move 'use function is_callable' to bottom of imports"

This reverts commit 7a3b155.

Author: Wout Gevaert

src/Query.php

@@ -21,6 +21,7 @@
 
 namespace WikibaseSolutions\CypherDSL;
 
+use function is_callable;
 use WikibaseSolutions\CypherDSL\Clauses\CallProcedureClause;
 use WikibaseSolutions\CypherDSL\Clauses\Clause;
 use WikibaseSolutions\CypherDSL\Clauses\CreateClause;
@@ -55,7 +56,6 @@
 use WikibaseSolutions\CypherDSL\Types\PropertyTypes\StringType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\NodeType;
 use WikibaseSolutions\CypherDSL\Types\StructuralTypes\PathType;
-use function is_callable;
 
 /**
  * Builder class for building complex Cypher queries.