v2.4 Composable and Tested

Fixes an issue in 2.3 where the --add-prefix option wasn't optional.
Adds unit testing coverage and an automated pipeline.
Makes the script more composable with each step able to be enabled/disabled discretely.

2.3 Add support for --add-prefix

Add changelog. Setup for 2.3 release (#15)

* Add changelog and v2.3 notes

* remove redundant add_prefix var

2.2 Multiple test suite support

Add support for multiple test suites (#12)

* First pass tweaks

* Add setup to skip tests and provide formatted file name

* Fix format output file path/name

* Fix plugin.yml

* tweak syntax

* Fix var sub

* Fix sum command

* Tidy up code and add docs

* Code review changes

* Remove quotes

* Ensure DS_Store is ignored

* Revert code review change

* Add quotes to coverage/"${formatted_file_prefix}".*.json

* Remove quotes

* Fix readme

Parallel File Formatting

Merge pull request #6 from jobready/parallel-file-format

Parallel file format

Multiple artifact support

add support for multiple artifacts (#3)

* add support for multiple artifacts

* clarify sum-coverage arguments

* remove debug

* handle unbound variable

* set default for parts

* add debug option

* fix shellcheck warnings

* fix shellcheck SC2086

* remove trace expansion

Version 1.0

Merge pull request #1 from jobready/initial

Initial implementation