Release 4.19.0

Version 4.19.0
2021-Aug-28

• Wrap errors in the data-driven encoder/decoder: On invalid input,
  catch for instance function clause errors and re-raise as
  a {gpb_error, Info} error instead. This has been the case
  for the generated encoder/decoder since 3.28.1. #211.

• Add an option {include_mod_hrl_prepend, string()} which can
  insert a string before the mod.hrl in the generated
  -include("mod.hrl"). (related to erlang/rebar3#2610)

• Remove the old parser. There has been no reported problems
  with the new parser for over a year.