Bump log4j-core from 2.10.0 to 2.16.0 (#28)

We need to upgrade the log4j2 version in projects due to security problems in log4j. refer to https://nvd.nist.gov/vuln/detail/CVE-2021-44228#toggleConfig1

Bump log4j2 version to 2.16.0.

Author: RobertIndie

pom.xml

@@ -54,7 +54,7 @@
 
     <!-- test dependencies -->
     <junit.version>4.12</junit.version>
-    <log4j2.version>2.10.0</log4j2.version>
+    <log4j2.version>2.16.0</log4j2.version>
     <mockito.version>2.22.0</mockito.version>
     <powermock.version>2.0.0-beta.5</powermock.version>
     <streamnative-tests.version>0.0.14</streamnative-tests.version>