Resolves compile error with Boost 1.71.0

[dionisioedu]

Summary

Details

Motivation and Context

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• It is my own work, its copyright is implicitly assigned to the project and no substantial part of it has been copied from other sources (including Stack Overflow). In rare occasions this is acceptable, like in CMake modules where the original copyright information should be kept.
• I'm using the same code standards as the existing code (indentation, spacing, variable naming, ...).
• I've added tests for my code.
• I have verified whether my change requires changes to the documentation
• My change either requires no documentation change or I've updated the documentation accordingly.
• My branch has been rebased to master, keeping only relevant commits.

[dionisioedu]

There is a new virtual function on the boost::unit_test::unit_test_log_formatter in a new version of boost.

[coveralls]

Coverage remained the same at 62.47% when pulling 66ff5c8 on dionisioedu:feature/compile-for-boost-107100 into dd424c1 on cucumber:master.

[LukasWoodtli]

This is basically a duplicate of #225 and #227. As far as I know the API change is already in Boost 1.70 so the version check is not right in this PR.