升级druid到最新版本1.2.20

pom.xml

@@ -18,7 +18,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
         <maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
-        <druid.version>1.2.16</druid.version>
+        <druid.version>1.2.20</druid.version>
         <bitwalker.version>1.21</bitwalker.version>
         <swagger.version>3.0.0</swagger.version>
         <kaptcha.version>2.3.3</kaptcha.version>