PHP 8.1 Tidy up

[emteknetnz]

Parent issue for pull-requests to tidy up PHP 8.1 work

TODO

• Get tractorcow/classproxy - need either a 0.1.3 tag OR proxy-db to use ^1 - see linked PR below. If we update proxy-db, also need pull-requests to update silverstripe/auditor and silverstripe/fulltextsearch which both require proxy-db
• Ensure silverstripe/recipe-solr-search requires 3.10.x-dev of fulltextsearch (should happen automatically as part of cow release)
• https://app.travis-ci.com/github/silverstripe/silverstripe-installer/jobs/568330265#L1305 (fixed in graphql PR below)

Notes on trying to get travis ci to fail on deprecations:

Depite this PR - we still have green jobs with deprecation warnings

I don't think we can get phpunit to properly fail on deprecation notices - I've tried the following custom error handler in SapphireTest.php along with --fail-on-warning

set_error_handler(function (int $number, string $message) {
    trigger_error($message, E_USER_WARNING);
}, E_DEPRECATED | E_USER_DEPRECATED);

However tests are still green despite the presence of Warning: strtoupper(): Passing null to parameter #1 ($string) of type string is deprecated

I've also tried updating phpunit.xml.dist - https://phpunit.readthedocs.io/en/9.5/configuration.html - however failOnWarning="true" which is equally useless as --fail-on-warning and convertDeprecationsToExceptions="true" is too brutal and causes phpunit to exit

PRs

• MNT Remove fix deprecated test bringyourownideas/silverstripe-composer-update-checker#63
• ENH PHP 8.1 compatibility fix silverstripe-graphql#461
• MNT Do not allow failures on php 8.1 silverstripe-installer#320
• MNT Do not allow failures on php 8.1 silverstripe-graphql#462
• DEP Require classproxy ^1 tractorcow/silverstripe-proxy-db#3
• MNT Require 4.x-dev of installer recipe-blog#31
• MNT Only use mysql in matrix silverstripe-installer#321
• MNT Disallow failures on php 8.1 symbiote/silverstripe-multivaluefield#81
• MNT Update build matrix silverstripe-serve#30
• MNT Fix risky test warning silverstripe-config#57
• MNT Update matrix vendor-plugin#53
• MNT Disallow php 8.1 failure silverstripe-userforms#1143
• MNT Disallow failures on php 8.1 recipe-solr-search#7
• MNT Comment out sporadically failing behat assertions silverstripe-session-manager#109
• DEP Require proxy-db ^1 silverstripe-auditor#43
• DEP Require proxy-db ^1 silverstripe-fulltextsearch#322

[GuySartorelli]

PRs are merged, but there is an acceptance criterion that can't be ticked off until the cow beta release either does or does not update composer.json in recipe-solr-search.

[GuySartorelli]

recipe-solr-search is correct in 4.11. All acceptance criteria met.