Fixes https://github.com/turt2live/matrix-media-repo/issues/346

Bump lodash from 4.17.19 to 4.17.21 in /tests/performance

feat: support `org.matrix.msc2705.animated` query parameter

Mitigate media repo XSS attacks on IE11 via the non-standard X-Content-Security-Policy header.

Add support for S3 storage classes

Grafana: Sort tooltip decreasing on Thumbnail Generation and Resource Handling

Let health check endpoint accept HEAD method

Iterate MSC2448 support

Fix MSC2448 implementation

Fixes https://github.com/turt2live/matrix-media-repo/issues/321

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.19 to 4.17.21.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.19...4.17.21

)

Signed-off-by: dependabot[bot] <support@github.com>

This reverts commit 5e51abbd.

For https://github.com/turt2live/matrix-media-repo/issues/53

This is probably super ugly Go code, but it works.

Fixes https://github.com/turt2live/matrix-media-repo/issues/323

See https://github.com/turt2live/matrix-media-repo/security/advisories/GHSA-j889-h476-hh9h