Basic auth replacer not working if user/pass contains special characters such as ` or $ (also a security issue: code injection)

[glitch8eda]

When using the Authorization header with Basic authentication, if the username and password contain special characters like backtick (`) or $, the value of the variable following the dollar sign is being interpreted before it is passed to base64, resulting in unexpected 401 errors.

Workaround is to perform the base64 conversion with a separate tool and use the base64 string directly in the http file.

Affected code is here (BasicAuthReplacer.ts):
return Basic ${Buffer.from(${match.groups.user}:${match.groups.password}).toString('base64')};