fix: suppress missing module error

- code as written expects the file may be absent and has a fallback
  implemented, so the error can be safely ignored. There may be a better
  strategy for dealing with this, however.

load-config.js

@@ -1,5 +1,6 @@
 let config;
 try {
+  // @ts-expect-error TS2307: we expect this file may not exist
   config = require('./config');
 } catch (e) {
   let fs = require('fs');