chore(cli-repl): prepare webpack config for kerberos bump

Prep work for MONGOSH-1881, this will be necessary in order to
adopt a recent kerberos addon version, similar to what we did
for monogdb-client-encryption.

Author: addaleax

packages/cli-repl/webpack.config.js

@@ -87,6 +87,9 @@ const config = {
       'commonjs2 ../build/Release/mongocrypt.node',
     '../build/Debug/mongocrypt.node':
       'commonjs2 ../build/Debug/mongocrypt.node',
+    '../build/Release/kerberos.node':
+      'commonjs2 ../build/Release/kerberos.node',
+    '../build/Debug/kerberos.node': 'commonjs2 ../build/Debug/kerberos.node',
   },
 
   externalsPresets: {