update mysql & postgresql version for proxy (#5721)

* update mysql & postgresql version for proxy

* fix unit test error

sharding-proxy/sharding-proxy-frontend/sharding-proxy-frontend-postgresql/src/main/java/org/apache/shardingsphere/shardingproxy/frontend/postgresql/auth/PostgreSQLAuthenticationEngine.java

@@ -71,7 +71,7 @@ public final class PostgreSQLAuthenticationEngine implements AuthenticationEngin
         backendConnection.setCurrentSchema(databaseName);
         // TODO send a md5 authentication request message
         context.write(new PostgreSQLAuthenticationOKPacket(true));
-        context.write(new PostgreSQLParameterStatusPacket("server_version", "8.4"));
+        context.write(new PostgreSQLParameterStatusPacket("server_version", "12.3"));
         context.write(new PostgreSQLParameterStatusPacket("client_encoding", "UTF8"));
         context.write(new PostgreSQLParameterStatusPacket("server_encoding", "UTF8"));
         context.writeAndFlush(new PostgreSQLReadyForQueryPacket());

sharding-scaling/sharding-scaling-mysql/src/test/java/org/apache/shardingsphere/shardingscaling/mysql/client/netty/MySQLNegotiateHandlerTest.java

@@ -79,9 +79,9 @@ public final class MySQLNegotiateHandlerTest {
         mySQLNegotiateHandler.channelRead(channelHandlerContext, handshakePacket);
         verify(channel).writeAndFlush(ArgumentMatchers.any(MySQLHandshakeResponse41Packet.class));
         ServerInfo serverInfo = ReflectionUtil.getFieldValueFromClass(mySQLNegotiateHandler, "serverInfo", ServerInfo.class);
-        assertThat(serverInfo.getServerVersion().getMajor(), is(5));
-        assertThat(serverInfo.getServerVersion().getMinor(), is(6));
-        assertThat(serverInfo.getServerVersion().getSeries(), is(4));
+        assertThat(serverInfo.getServerVersion().getMajor(), is(8));
+        assertThat(serverInfo.getServerVersion().getMinor(), is(0));
+        assertThat(serverInfo.getServerVersion().getSeries(), is(20));
     }
     
     @Test

shardingsphere-database-protocol/shardingsphere-database-protocol-mysql/src/main/java/org/apache/shardingsphere/database/protocol/mysql/constant/MySQLServerInfo.java

@@ -34,7 +34,7 @@ public final class MySQLServerInfo {
     /**
      * Server version.
      */
-    public static final String SERVER_VERSION = "5.6.4-Sharding-Proxy 4.1.0";
+    public static final String SERVER_VERSION = "8.0.20-Sharding-Proxy 4.1.0";
     
     /**
      * Charset code 0x21 is utf8_general_ci.