Update CHANGELOG.md

update changelog for v2.1.4 (#25)

update dotnet.yml (#18)

target multiple dotnet versions (#16)

Updated SDK Version and StyleCop (#15)

- closes #13 
- closes #14

update types so full objects show again (#12)

update dependencies

Handle OpenXmlPackageException Exceptions (#9)

* Handle OpenXmlPackageExceptions exceptions

* Reformat XML return data

Validate Directories (#7)

* allow bulk validation of files

* can validate recursively through folders

* make recursive folder examination optional

* make fileService to use DI, so testing is easier

* add tests for new functionality

* up version

* update readme

* update changelog

Check for strict and return xml

Adds the ability to return XML and adds the `IsStrict` attribute to the XML. Closes #3.