feat(editorconfig): add config for go files

.editorconfig

 # http://editorconfig.org
 root = true
 
+[*.go]
+indent_style = tabs
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
 [*]
 indent_style = space
 indent_size = 2