Update dependency org.apache.maven.plugins:maven-source-plugin to v2.4

[renovate-bot]

This PR contains the following updates:

Package	Update	Change
org.apache.maven.plugins:maven-source-plugin	minor	2.2.1 -> 2.4

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[codecov]

Codecov Report

Merging #253 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #253   +/-   ##
=========================================
  Coverage     78.23%   78.23%           
  Complexity      330      330           
=========================================
  Files            21       21           
  Lines          1447     1447           
  Branches        158      158           
=========================================
  Hits           1132     1132           
  Misses          237      237           
  Partials         78       78

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