Updated net/restclient-ui to 3.7.1

Changes

3.7.1

  Restored support for Java 8.

3.7.0

  #71 Added support for empty passwords for BASIC and DIGEST auth.
  #72 Ability to edit URL encoded body parameter.
  #73 Zip distribution build was generating wrong format.

3.6.2

  XML formatting now uses jxmlfmt.
  Built using Java 10. Requires Java 10 to run.

(abs)