Log Message:
erlang-stringprep: Update to 1.0.29

upstream changes:
-----------------
Version 1.0.29
  o Make test more robust
Version 1.0.28
  o Updating p1_utils to version 1.0.25.
Version 1.0.27
  o Updating p1_utils to version 1.0.23.
  o Switch from using Travis to Github Actions as CI
Version 1.0.26
  o Add tolower_nofilter function
  o Don't throw errors if nif library is already loaded
Version 1.0.25
  o Updating p1_utils to version 1.0.22.