build: update slf4j to 1.7.30

Changelog: http://slf4j.org/news.html

Fix #1185

Author: php-coder

pom.xml

@@ -620,7 +620,7 @@
 		<skipUnitTests>false</skipUnitTests>
 
 		<!-- Redefine default value from spring-boot-dependencies -->
-		<slf4j.version>1.7.26</slf4j.version>
+		<slf4j.version>1.7.30</slf4j.version>
 
 		<sortpom.plugin.version>2.5.0</sortpom.plugin.version>