Merge pull request #577 from hazendaz/master

[pom] Update slf4j to 1.7.16

Author: hazendaz

pom.xml

@@ -158,13 +158,13 @@
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-api</artifactId>
-      <version>1.7.14</version>
+      <version>1.7.16</version>
       <optional>true</optional>
     </dependency>
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
-      <version>1.7.14</version>
+      <version>1.7.16</version>
       <optional>true</optional>
     </dependency>
     <dependency>