added test to find dash/hyphen with preceeding or following spaces or
both
updated regex to account for words/acronyms/numbers separated by spaces.

The regex can be refined to exclude leading and trailing spaces from the
results of pascalCaseWordBoundary.Split(). For now, word.Trim() is added
to discard the unneeded space.
added various test cases for space, dash and hyphen handling.
Removed unneccessary .Trim() from word.Length line
Removed multiple Trim()s within Select(), added a single Trim() in Aggregate()
Simplified regex by removing [\s]{0}. Updated comment to say 'underscore' instead of 'hyphen'
Updated release_notes.md with PR#341 information.
Changed the method name to highlight dealing with dashes
Merge branch 'StringExtensions'
Added Uzbek localization and tests
Removed autogenerated lines in ".csproj" files
Added PR to the release-notes file
Merge branch 'uzbek-localisation'
Releasing v1.30.0
fix time span humanization precision skipping

fixes #339
add PR to release notes
introduce optional considerEmptyParts parameter to TimeSpan Humanize method