upgrade druid & mysql.

pom.xml

@@ -34,21 +34,21 @@
                 <artifactId>java-sdk</artifactId>
                 <version>3.16</version>
             </dependency>
+            <dependency>
+                <groupId>com.alibaba</groupId>
+                <artifactId>druid</artifactId>
+                <version>1.1.19</version>
+            </dependency>
             <dependency>
                 <groupId>mysql</groupId>
                 <artifactId>mysql-connector-java</artifactId>
-                <version>6.0.6</version>
+                <version>8.0.17</version>
             </dependency>
             <dependency>
                 <groupId>com.microsoft.sqlserver</groupId>
                 <artifactId>mssql-jdbc</artifactId>
                 <version>6.4.0.jre8</version>
             </dependency>
-            <dependency>
-                <groupId>com.alibaba</groupId>
-                <artifactId>druid</artifactId>
-                <version>1.1.16</version>
-            </dependency>
             <dependency>
                 <groupId>com.google.guava</groupId>
                 <artifactId>guava</artifactId>