Bump optional dependencies

References #644

Author: acogoluegnes

pom.xml

@@ -54,11 +54,11 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-    <slf4j.version>1.7.29</slf4j.version>
+    <slf4j.version>1.7.30</slf4j.version>
     <metrics.version>3.2.6</metrics.version>
     <micrometer.version>1.0.11</micrometer.version>
-    <jackson.version>2.10.1</jackson.version>
-    <httpclient.version>4.5.10</httpclient.version>
+    <jackson.version>2.10.3</jackson.version>
+    <httpclient.version>4.5.12</httpclient.version>
     <logback.version>1.2.3</logback.version>
     <junit.version>4.12</junit.version>
     <awaitility.version>4.0.1</awaitility.version>