Declare used slf4j dependency (#95)

* declare used dependencies
* remove unneeded dependency
diff --git a/pom.xml b/pom.xml
index 1488f62..62efd70 100644
--- a/pom.xml
+++ b/pom.xml
@@ -254,9 +254,9 @@
       </exclusions>
     </dependency>
     <dependency>
-      <groupId>javax.ws.rs</groupId>
-      <artifactId>jsr311-api</artifactId>
-      <version>1.1.1</version>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-api</artifactId>
+      <version>1.7.36</version>
     </dependency>
 
     <!-- commons -->