* bouncycastle: ('bcprov-jdk15on' and 'bcpkix-jdk15on'): 1.57 -->> 1.60
  * groovy: 2.4.11 -->> 2.4.15
  * joda-time: 2.9.9 -->> 2.10
  * JDBC connectors:
 	 ** mysql-connector-java: 5.1.41 -->> 5.1.46 (see notes and links below)
     ** postgresql: 9.0 -->> 42.2.4 (42.x line supports PostgreSQL 8.2 and higher: https://jdbc.postgresql.org/documentation/faq.html#versioning)

MySQL connector notes:
  * line 5.1.x: it seems that mysql-connector-java 5.1.x line supports MySQL server versions >= 5.1
      ** version 5.1.41 release notes (https://forums.mysql.com/read.php?3,655541) claim that version is 'suitable for use with many MySQL server versions, including 4.1, 5.0, 5.1, 5.4 and 5.5'
      ** version 5.1.46 release notes (https://forums.mysql.com/read.php?3,664948) fail to mention support for versions < 5.5 (presumably, this will encourage users to upgrade their MySQL server(s) to a more recent version). However, compatibility with archived MySQL server versions should be kept (highly likely/almost certainly).
  * line 8.0.x: supports only MySQL server versions >= 5.5 (according to release notes, that is)

Dozen of related links:
    * https://dev.mysql.com/downloads/connector/j/5.1.html
    * https://insidemysql.com/mysql-connectorj-5-1-41-has-been-released
    * https://dev.mysql.com/doc/relnotes/connector-j/5.1/en/news-5-1-41.html
    * https://forums.mysql.com/read.php?3,655541 MySQL Connector/J 5.1.41 has been released
    * https://insidemysql.com/mysql-connector-java-5-1-46
    * https://dev.mysql.com/doc/relnotes/connector-j/5.1/en/news-5-1-46.html
    * https://forums.mysql.com/read.php?3,664948 MySQL Connector/Java 5.1.46 GA has been released
    * https://dev.mysql.com/downloads/connector/j/8.0.html
    * https://insidemysql.com/connector-j-8-0-11-the-face-for-your-brand-new-document-oriented-database
    * https://insidemysql.com/mysql-connector-java-8-0-12
    * https://dev.mysql.com/doc/relnotes/connector-j/8.0/en/news-8-0-12.html