Merge pull request #18 from dc0d/json-friendly

flatten sub-package

Merge pull request #17 from dc0d/remove_tracker_func

remove tracker func

Merge pull request #16 from dc0d/add-makerr

add makerr

Merge pull request #15 from dc0d/fix-middle-annotation

fix middle annotation

Merge pull request #14 from dc0d/add-formatting-message

add WithStackf

Merge pull request #13 from dc0d/change_json_output

change json output

Merge pull request #12 from dc0d/test-coverage

add code quality & test coverage check

Merge pull request #11 from dc0d/use-short-file-path

use short file path

Merge pull request #10 from dc0d/apply-feedback

Apply feedback

Merge pull request #8 from dc0d/add-examples

add more examples