Add EditorConfig file
Add EditorConfig file

EditorConfig (https://editorconfig.org) is a dotfile which stores
configuration that is supported by a wide variety of text editors and
IDEs both natively and with plugins. This allows us to enforce project
standards such as line endings and indentation style.

Signed-off-by: Charlie Jonas <d8cd10b920dcbdb5163ca0185e402357bc27c265@charliejonas.co.uk>
sparrc/go-ping