Fixed typos

Author: grimzy

src/MysqlConnection.php

@@ -1,7 +1,7 @@
 <?php
 namespace Grimzy\LaravelSpatial;
 
-class MysqlConnection extends \Illuminate\Database\MysqlConnection
+class MysqlConnection extends \Illuminate\Database\MySqlConnection
 {
 //    public function __construct($pdo, $database = '', $tablePrefix = '', array $config = [])
 //    {

src/Schema/Builder.php

@@ -2,9 +2,9 @@
 namespace Grimzy\LaravelSpatial\Schema;
 
 use Closure;
-use Illuminate\Database\Schema\MysqlBuilder;
+use Illuminate\Database\Schema\MySqlBuilder;
 
-class Builder extends MysqlBuilder
+class Builder extends MySqlBuilder
 {
     /**
      * Create a new command set with a Closure.