Update .editorconfig to include defaults for go.work and go.work.sum as a reference for Go projects (#210)

Since this file is also used as the reference for Go projects, I thought I would add these missing files here.

Signed-off-by: Steve Coffman <steve@khanacademy.org>

Author: StevenACoffman

.editorconfig

@@ -9,10 +9,18 @@ trim_trailing_whitespace = true
 indent_style = space
 indent_size = 2
 
-[{Makefile,go.mod,go.sum,*.go,.gitmodules}]
+[{Makefile,*.go,.gitmodules}]
 indent_style = tab
 indent_size = 4
 
+[go.{mod,work,work.sum,sum}]
+charset = unset
+end_of_line = unset
+insert_final_newline = unset
+trim_trailing_whitespace = unset
+indent_style = unset
+indent_size = unset
+
 [*.md]
 indent_size = 4
 trim_trailing_whitespace = false