build: update .editorconfig settings

Added tab_width setting.

Signed-off-by: Sacha Telgenhof <me@sachatelgenhof.com>

Author: stelgenhof

.editorconfig

@@ -6,6 +6,7 @@ end_of_line = lf
 indent_size = 4
 indent_style = space
 insert_final_newline = true
+tab_width = 4
 trim_trailing_whitespace = true
 
 [*.json]