Upgrade Express to 5.x

[philvarner]

Upgrading Express from 4.x to 5.x results in numerous cases where this error occurs in test:system

{"level":"error","message":"params.hasOwnProperty is not a function","stack":"TypeError: params.hasOwnProperty is not a function\n    at extractFields (file:///Users/philvarner/code/stac-utils/stac-server/src/lib/api.js:311:21)\n    at Object.searchItems (file:///Users/philvarner/code/stac-utils/stac-server/src/lib/api.js:596:18)\n    at file:///Users/philvarner/code/stac-utils/stac-server/src/lambdas/api/app.js:256:31\n    at processTicksAndRejections (node:internal/process/task_queues:105:5)"}