fix for encodeing postLogoutRedirectUri twice

[ghost]

This pr fixes an issue in auth0.handleLogout(req, res) where the post redirect url was encoded twice causing issues logging out on identity. This still falls back to use the default Auth0 logout URL, thus existing behavior is not broken.

References

Solves the problem described in #126

Testing

• This change adds test coverage for new/changed/fixed functionality

Checklist

• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master
• I have added documentation for new/changed functionality in this PR or in auth0.com/docs

[chriskolenko]

Can confirm this fixes the double encoding problem for logout.

[sandrinodimattia]

Thank you 👍 It introduces an other small issue, but I'll fix it separately.