fix deprecation warning -> use onfigurableReport.setDestination(File)

[epeee]

basically, getting rid of this warning

> Configure project :shipkit
The ConfigurableReport.setDestination(Object) method has been deprecated and is scheduled to be removed in Gradle 5.0. Please use the method ConfigurableReport.setDestination(File) instead.
        at shipkit_2cr6fz4tp44wkkz1iroi80u1s$_run_closure9$_closure18.doCall(/home/ep/projects/github/mockito-project/mockito-release-tools/subprojects/shipkit/shipkit.gradle:103)

[mstachniuk]

👍 Tried to fix this same right now, but your code is more elegant

[codecov]

Codecov Report

Merging #817 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #817   +/-   ##
=========================================
  Coverage     94.25%   94.25%           
  Complexity      475      475           
=========================================
  Files           156      156           
  Lines          2244     2244           
  Branches         77       77           
=========================================
  Hits           2115     2115           
  Misses           61       61           
  Partials         68       68

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