Add an editorconfig file.
Add an editorconfig file.

brian-yang/mozillians,safwanrahman/mozillians,anistark/mozillians,akatsoulas/mozillians,safwanrahman/mozillians,mozilla/mozillians,fxa90id/mozillians,mozilla/mozillians,mozilla/mozillians,chirilo/mozillians,akarki15/mozillians,johngian/mozillians,brian-yang/mozillians,johngian/mozillians,chirilo/mozillians,akatsoulas/mozillians,anistark/mozillians,akatsoulas/mozillians,chirilo/mozillians,akatsoulas/mozillians,johngian/mozillians,anistark/mozillians,akarki15/mozillians,fxa90id/mozillians,fxa90id/mozillians,johngian/mozillians,mozilla/mozillians,safwanrahman/mozillians,akarki15/mozillians,brian-yang/mozillians,akarki15/mozillians,anistark/mozillians,chirilo/mozillians,brian-yang/mozillians,fxa90id/mozillians,safwanrahman/mozillians