Upgrade MySql R2DBC driver to 1.0.6

Closes #1933

Author: schauder

pom.xml

@@ -51,7 +51,7 @@
 		<r2dbc-h2.version>1.0.0.RELEASE</r2dbc-h2.version>
 		<r2dbc-mariadb.version>1.1.4</r2dbc-mariadb.version>
 		<r2dbc-mssql.version>1.0.2.RELEASE</r2dbc-mssql.version>
-		<r2dbc-mysql.version>1.0.2</r2dbc-mysql.version>
+		<r2dbc-mysql.version>1.0.6</r2dbc-mysql.version>
 		<oracle-r2dbc.version>1.1.1</oracle-r2dbc.version>
 
 		<!-- test dependencies -->