r-tinytest2JUnit

Unit testing is a solid component of automated CI/CD pipelines. 'tinytest' - a lightweight, zero-dependency alternative to 'testthat' was developed. To be able to integrate 'tinytests' results into common CI/CD systems the test results from tinytest need to be caputred and converted to JUnit XML format. 'tinytest2JUnit' enables this conversion while staying also lightweight and only have 'tinytest' as its dependency.