Merge pull request antlr#39 from teverett/dependabot/maven/org.slf4j-slf4j-api-1.7.34

Bump slf4j-api from 1.7.33 to 1.7.34

Author: teverett

_grammar-test/pom.xml

@@ -28,7 +28,7 @@
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>slf4j-api</artifactId>
-            <version>1.7.33</version>
+            <version>1.7.34</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>