v0.3.4 -- Update aws-lambda-java-log4j to log4j2:1.3.0

Per https://aws.amazon.com/security/security-bulletins/AWS-2021-005/, users of aws-lambda-java-log4j2 should update to v1.3.0. We were not able to determine whether aws-lambda-java-log4j:1.0.1 was safe or not, so it was decided that we should update to aws-lambda-java-log4j2:1.3.0 to be sure.

datadog-lambda-java:0.3.4 should behave exactly the same as 0.3.3.

barring any additional critical security fixes, this will probably be the last update to datadog-lambda-java:0.3.x. Additional updates will be in v1.4.x

https://search.maven.org/artifact/com.datadoghq/datadog-lambda-java/0.3.4/jar

Latest corresponding dd-trace-java layer ARN:

arn:aws:lambda:<AWS_REGION>:464622532012:layer:dd-trace-java:3