Update to Log4J 2.16. (airbytehq#8779)

See https://logging.apache.org/log4j/2.x/changes-report.html#a2.16.0
Also see https://github.com/bluedenim/log4j-s3-search#important-note-on-log4j-vulnerabilty-httpswwwcisagovnews20211211statement-cisa-director-easterly-log4j-vulnerability

build.gradle

@@ -273,18 +273,18 @@ subprojects {
 
 
         // SLF4J as a facade over Log4j2 required dependencies
-        implementation 'org.apache.logging.log4j:log4j-api:2.15.0'
-        implementation 'org.apache.logging.log4j:log4j-core:2.15.0'
-        implementation 'org.apache.logging.log4j:log4j-slf4j-impl:2.15.0'
-        implementation 'org.apache.logging.log4j:log4j-web:2.15.0'
+        implementation 'org.apache.logging.log4j:log4j-api:2.16.0'
+        implementation 'org.apache.logging.log4j:log4j-core:2.16.0'
+        implementation 'org.apache.logging.log4j:log4j-slf4j-impl:2.16.0'
+        implementation 'org.apache.logging.log4j:log4j-web:2.16.0'
 
         // Bridges from other logging implementations to SLF4J
         implementation 'org.slf4j:jul-to-slf4j:1.7.30' // JUL bridge
         implementation 'org.slf4j:jcl-over-slf4j:1.7.30' //JCL bridge
         implementation 'org.slf4j:log4j-over-slf4j:1.7.30' // log4j1.2 bridge
 
         // Dependencies for logging to cloud storage, as well as the various clients used to do so.
-        implementation 'com.therealvan:appender-log4j2:3.1.2-SNAPSHOT'
+        implementation 'com.therealvan:appender-log4j2:3.3.0'
         implementation 'com.amazonaws:aws-java-sdk-s3:1.12.6'
         implementation 'com.google.cloud:google-cloud-storage:2.2.2'