add EditorConfig

[brylie]

Task

• [ ] add a .editorconfig file to the root directory of this project with the following contents
• [ ] add a note to the CONTRIBUTING guide about configuring .editorconfig support for VSCode and PyCharm

# http://editorconfig.org
root = true
[*]
charset = utf-8
end_of_line = lf
indent_style = space
indent_size = 2
trim_trailing_whitespace = true
insert_final_newline = true
[*.py]
indent_size = 4

[brylie]

@petesfrench, would you mind commenting on this issue so I can assign you? It's a minor formality, since GitHub won't let me assign you otherwise.

[petesfrench]

No problem and thank you!