add slf4j log support

Signed-off-by: wanjunlei <[email protected]>

Author: wanjunlei

functions-framework-invoker/pom.xml

@@ -120,6 +120,11 @@
             <artifactId>jersey-common</artifactId>
             <version>3.0.5</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>2.0.0-alpha6</version>
+        </dependency>
     </dependencies>
 
     <build>