MariaDB 3.1 driver increases application size of about 4MB

Hello,

we noticed an increase of our application of about 5MB when upgrading from 3.09 to 3.1.0

while the MariaDB driver (groupId : org.mariadb.jdbc, artifactId : mariadb-java-client) grows only from ~ 590K to 630K, we noticed, that it had a lot of new dependencies:

[INFO] +- org.mariadb.jdbc:mariadb-java-client:jar:3.1.0:compile (~630K)

[INFO] |  \- com.github.waffle:waffle-jna:jar:3.2.0:compile (~70K)

[INFO] |     +- net.java.dev.jna:jna:jar:5.10.0:compile (~1,7MB)

[INFO] |     +- net.java.dev.jna:jna-platform:jar:5.10.0:compile (~1,3M)

[INFO] |     \- com.github.ben-manes.caffeine:caffeine:jar:2.9.3:compile (~910K)

[INFO] |        \- com.google.errorprone:error_prone_annotations:jar:2.10.0:compile (~15K)

It seems that the windows authentication framework (https://github.com/Waffle/waffle) will require these dependencies. As we (and many others) will use the driver in a linux environment, these dependencies are useless there. I assume also, that there are many people that would not use this feature in windows environment.
So, I would suggest to add these dependencies as optional dependencies or add a short hint in README, if and how they can be excluded in pom.xml.