allow for handling of redirects in toml resolver

[KyleSmith19091]

Linked Issue: https://github.com/stellar/js-stellar-sdk/issues/1052

[Shaptic]

Ah yes, @KyleSmith19091 you need to gpg sign your commits for them to be merged into this repo :pray:

[KyleSmith19091]

@Shaptic would you mind just taking a look again, I merged master and noticed the change from using axios to instead using the httpClient interface, so just had to make a small change