Bump slf4j-simple from 1.7.6 to 1.7.30

Bumps [slf4j-simple](https://github.com/qos-ch/slf4j) from 1.7.6 to 1.7.30.
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](qos-ch/slf4j@v_1.7.6...v_1.7.30)

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

Signed-off-by: dependabot[bot] <[email protected]>

_grammar-test/pom.xml

@@ -37,7 +37,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-simple</artifactId>
-            <version>1.7.6</version>
+            <version>1.7.30</version>
         </dependency>
     </dependencies>