Bump slf4j-api from 1.7.25 to 1.7.30 (#117)

Bumps [slf4j-api](https://github.com/qos-ch/slf4j) from 1.7.25 to 1.7.30.
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](qos-ch/slf4j@v_1.7.25...v_1.7.30)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -93,7 +93,7 @@ For more details, please see https://issues.apache.org/jira/browse/AURORA-1169
   ext.protobufRev = '3.5.1'
   ext.resteasyRev = '3.1.4.Final'
   ext.servletRev = '3.1.0'
-  ext.slf4jRev = '1.7.25'
+  ext.slf4jRev = '1.7.30'
   ext.stringTemplateRev = '3.2.1'
   ext.thriftRev = '0.10.0'
   ext.zookeeperRev = '3.4.8'