MAINT: Update Maven dependencies

[carlwilson]

• updated library dependencies where safe to do so;
• removed lifecycle-mapping-plugin for Eclipse;
• hunted out hard-coded versions in pom.xml files and replaced with properties;
• removed redundant jwat.version property; and
• fixed license header typo.

[codecov]

Codecov Report

Base: 46.32% // Head: 46.32% // No change to project coverage 👍

Coverage data is based on head (b115dd6) compared to base (252672f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@              Coverage Diff               @@
##             integration     #798   +/-   ##
==============================================
  Coverage          46.32%   46.32%           
  Complexity          1053     1053           
==============================================
  Files                 57       57           
  Lines               9079     9079           
  Branches            1609     1609           
==============================================
  Hits                4206     4206           
  Misses              4335     4335           
  Partials             538      538           

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