2.14.1: add php8 to circleci config (#22)

* add php8 to circleci config

* update unit tests

* remove config

* - update for php8
- deprecate php < 7.3

* upgrade phpunit

2.14.0

Resolve DepArr

1.29.0

Resolve with data

2.12.0: support iterate and flatten, fix issue with null item IDs (#21)

* support iterate and flatten, fix issue with null item IDs

* different approach to level-order

* add branch flatten (depth-first)

2.11.1

Fix path builder

2.11.0

move timehelper tests to datetimehelper

1.28.1

Fix path builder

1.28.0

move timehelper tests to datetimehelper

2.10.3

Correct key

1.27.3

FQDN Defined SLDs