.editorconfig: accept package.json indent as is

These files are generally pulled automatically from the upstream
repository and shouldn't need to be modified.

.editorconfig

@@ -44,6 +44,10 @@ indent_size = 4
 indent_size = 2
 indent_style = space
 
+# Match package.json, which are generally pulled from upstream and accept them as they are
+[package.json]
+indent_style = unset
+
 # Disable file types or individual files
 # some of these files may be auto-generated and/or require significant changes