[9.x] Make Connection Class Macroable (#41865)

* Make connection class macroable.

* Style fix.

* import style fix.

Author: haider00125

src/Illuminate/Database/Connection.php

@@ -19,6 +19,7 @@
 use Illuminate\Database\Query\Processors\Processor;
 use Illuminate\Database\Schema\Builder as SchemaBuilder;
 use Illuminate\Support\Arr;
+use Illuminate\Support\Traits\Macroable;
 use LogicException;
 use PDO;
 use PDOStatement;
@@ -28,7 +29,8 @@ class Connection implements ConnectionInterface
 {
     use DetectsConcurrencyErrors,
         DetectsLostConnections,
-        Concerns\ManagesTransactions;
+        Concerns\ManagesTransactions,
+        Macroable;
 
     /**
      * The active PDO connection.