v2.7.6

This patch includes an important security fix of xml-crypto package. See https://github.com/yaronn/xml-crypto/releases/tag/v2.0.0 for more detail.

#395 Bump xml-crypto version for security reason
#392 Update Auth0 sponsorship link (@Sambego)
#391 Added aes128-gcm in the data encryption algorithm list (@wanyunli)
#387 Update forked xml-encryption for security fix