upstream changes:
-----------------
Version 1.0.29
* Updating p1_utils to version 1.0.21.
Version 1.0.28
* Fix hex to support compiling ejabberd with rebar3
Version 1.0.27
* Updating p1_utils to version 1.0.20.
Version 1.0.26
* Fix compilation with Erlang/OTP 23.0
Version 1.0.25
* Updating p1_utils to version 1.0.19.
Version 1.0.24
* Use github actions for build/test
Version 1.0.23
* Updating p1_utils to version 1.0.18.
* Add flag that decodes yaml maps to erlang maps (Thanks to Arjan Scherpenisse)
* Add flag that converts special values to erlang equivalents (Thanks to Arjan Scherpenisse)
* Add p1_utils as dependant app
Version 1.0.22
* Updating p1_utils to version 1.0.17.
Version 1.0.21
* Fix handling of strings with ' inside them
Version 1.0.20
* Updating p1_utils to version 1.0.16.
* Handle erlang escape sequences
Version 1.0.19
* Updating p1_utils to version 1.0.15.
* Don't crash when atom lenght is > 255
Version 1.0.18
* Updating p1_utils to version 1.0.14.
* Add contribution guide
Version 1.0.17
* Updating p1_utils to version 1.0.13.
Version 1.0.16
* Updating p1_utils to version 6ff85e8.
* Add handling of unicode string
c2e57133df