Bump slf4j.version from 1.7.30 to 1.7.31

Bumps `slf4j.version` from 1.7.30 to 1.7.31.

Updates `slf4j-api` from 1.7.30 to 1.7.31
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](https://github.com/qos-ch/slf4j/commits)

Updates `slf4j-ext` from 1.7.30 to 1.7.31
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](https://github.com/qos-ch/slf4j/commits)

---
updated-dependencies:
- dependency-name: org.slf4j:slf4j-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.slf4j:slf4j-ext
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -77,7 +77,7 @@
 
     <properties>
         <maven.version>3.5.0</maven.version>
-        <slf4j.version>1.7.30</slf4j.version>
+        <slf4j.version>1.7.31</slf4j.version>
         <jackson.version>2.12.3</jackson.version>
         <bouncycastle.version>1.69</bouncycastle.version>
         <resilience4j.version>1.7.0</resilience4j.version>