Cleanup pom.xml versions

[uhafner]

Use BOM where possible.

[codecov]

Codecov Report

Merging #365 (421eb44) into master (75c7b3a) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #365   +/-   ##
=========================================
  Coverage     80.12%   80.12%           
  Complexity      157      157           
=========================================
  Files            22       22           
  Lines           644      644           
  Branches         69       69           
=========================================
  Hits            516      516           
  Misses          100      100           
  Partials         28       28           

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