Update version and add connection test query

The version of MYSQL-Api in pom.xml is updated from 5.7.5 to 5.7.6. Additionally, a connection test query is added in MYSQL.java to test the validity of a connection by executing a query that most probably be valid on the database. These changes ensure project dependencies are up to date and increase the robustness of the database connection handling.

Author: coilgner

pom.xml

@@ -5,7 +5,7 @@
 
     <groupId>de.goldendeveloper</groupId>
     <artifactId>MYSQL-Api</artifactId>
-    <version>5.7.5</version>
+    <version>5.7.6</version>
     <packaging>jar</packaging>         
     <url>https://github.com/Golden-Developer/MYSQL-Api</url>
 

src/main/java/de/goldendeveloper/mysql/MYSQL.java

@@ -409,6 +409,7 @@ private void createConnectionConfig() {
         config.setLeakDetectionThreshold(TimeUnit.SECONDS.toMillis(60));
         config.setUsername(this.username);
         config.setPassword(this.password);
+        config.setConnectionTestQuery("SELECT 1");
         try {
             this.ds = new HikariDataSource(config);
         } catch (Exception e) {