Bump express from 4.19.2 to 4.20.0 (#1254)

* Bump express from 4.19.2 to 4.20.0

Bumps [express](https://github.com/expressjs/express) from 4.19.2 to 4.20.0.
- [Release notes](https://github.com/expressjs/express/releases)
- [Changelog](https://github.com/expressjs/express/blob/master/History.md)
- [Commits](expressjs/express@4.19.2...4.20.0)

---
updated-dependencies:
- dependency-name: express
  dependency-type: direct:production
...

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

* add changeset

Signed-off-by: Brian DeHamer <bdehamer@github.com>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Brian DeHamer <bdehamer@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Brian DeHamer <bdehamer@github.com>

.changeset/popular-emus-remain.md

@@ -0,0 +1,5 @@
+---
+'@sigstore/mock-server': patch
+---
+
+Bump express from 4.19.2 to 4.20.0