Bump slf4j-jdk14 from 1.7.26 to 1.7.30 (#301)

Bumps [slf4j-jdk14](https://github.com/qos-ch/slf4j) from 1.7.26 to 1.7.30.
- [Release notes](https://github.com/qos-ch/slf4j/releases)
- [Commits](https://github.com/qos-ch/slf4j/compare/v_1.7.26...v_1.7.30)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

core/pom.xml

@@ -47,7 +47,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-jdk14</artifactId>
-            <version>1.7.26</version>
+            <version>1.7.30</version>
         </dependency>
 
         <!--GSON is not at the right position for Minecraft 1.7-->