Log Message:
textproc/ruby-diff-lcs: update to 1.5.0

1.5.0 (2021-12-23)

* Updated the CI configuration and monkey-patch Hoe.

* Kenichi Kamiya fixed a test configuration deprecation in SimpleCov.  #69

* Tien introduced several corrections and code improvements:

	o Removed an off-by-one error when calculating an index value by
	  embracing Ruby iteration properly.  This had a side-effect of
	  fixing a long-standing bug in #traverse_sequences where the
	  traversal would not be transitive.  That is, LCS(s2, s1) should
	  produce a sequence that is transitive with LCS(s1, s2) on
	  traversal, and applying the diff computed from those results would
	  result in equivalent changes that could be played forward or
	  backward as appropriate. #71, #75

	o The above fix resulted in a changed order of the longest common
	  subsequence when callbacks were applied.  After analysis, it was
	  determined that the computed subsequence was equivalent to the
	  prior version, so the test was updated.  This also resulted in the
	  clarification of documentation when traversing the subsequences.
	  #79

	o An infinite loop case in the case where Diff::LCS would be
	  included into an enumerable class has been fixed.  #73

	o Clarified the purpose of a threshold test in calculation of
	  LCS. #72, #80

* Removed autotest directory