v0.3.6 -- Remove transitive dependency on log4j

While investigating CVE-2021-45105, we determined that our transitive dependency on log4j was unnecessary, so we removed it.

datadog-lambda-java:0.3.6 should behave exactly the same as 0.3.4.

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/0.3.6/jar

Latest corresponding dd-trace-java layer ARN:

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