Remove reference to a minified JS file's map file

Fixed

• Remove reference (in comment) to material.min.js.map

Add WebAuthn support

Added

• Use npm to install client library for handling WebAuthn
• Add template (etc.) files for WebAuthn support

Fixed

• Explicitly require the JSON PHP extension, since we use it
• Update the copyright year in the license file

Small fixes (CSRF, debugging info)

Fixed

• Only add the CSRF token to the form if one was provided
• Add some more detail to the README's debugging instructions

Adjust UX based on U2F support

Fixed

• Improve UX for browsers we don't support U2F in
• Ease the setup of step-debugging (documentation, helper script) for local development

Stop supporting vulnerable SimpleSAMLphp versions

Fixed

• Raise supported version of SimpleSAMLphp to non-vulnerable version
• Switch to official MariaDB image for databases (for local dev/testing)

Assume u2f is always supported

Merge pull request #93 from silinternational/develop

Release 7.4.0

Move preventDefault function out of `if` block to ensure it is available

Merge pull request #91 from silinternational/develop

Get function out of if block so it is always available

Avoid having IE11 complain about the modern "onsubmit" js

Merge pull request #90 from silinternational/develop

Release 7.3.8

Update SimpleSAMLphp to 1.18.6

Merge pull request #88 from silinternational/develop

Release - add SimpleSAMLphp ~1.18.5

Fix tile image css overflow issue

See PR #87