Co-authored-by: Thijs Kinkhorst <thijs@kinkhorst.com>

Fix spellings and typos

SAML2INT:  default attrname-format to uri

This reverts commit 00716eb4.

Signed-off-by: Jaime Pérez Crespo <jaime.perez@uninett.no>

* Update Psalm

* Ignore DocblockTypeContradiction and RedundantConditionGivenDocblockType

* Fix Psalm-errors

* Raise minimum PHP-version to 5.6

* Update lock-file accordingly

* Fix phpunit

* Suppress Psalm-issue

Some metadata publishers offer SHA256 fingerprints to validate the
fingerprint of the certificate used to sign metadata. Allow users to
configure the fingerprinting algorithm to facilitate validation.

For backward compatibility, the default algorithm remains SHA1.