Bump slf4j.version from 1.7.26 to 1.7.29

Bumps `slf4j.version` from 1.7.26 to 1.7.29.

Updates `slf4j-api` from 1.7.26 to 1.7.29
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](https://github.com/qos-ch/slf4j/commits)

Updates `slf4j-simple` from 1.7.26 to 1.7.29
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](https://github.com/qos-ch/slf4j/commits)

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

pom.xml

@@ -26,7 +26,7 @@
         <nexus-staging-maven-plugin.version>1.6.8</nexus-staging-maven-plugin.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <rxjava-jdbc.version>0.7.16</rxjava-jdbc.version>
-        <slf4j.version>1.7.26</slf4j.version>
+        <slf4j.version>1.7.29</slf4j.version>
         <spring-jdbc.version>5.1.9.RELEASE</spring-jdbc.version>
         <sql2o.version>1.6.0</sql2o.version>
         <hsqldb.version>2.5.0</hsqldb.version>