Add support for express 5.0.0-beta.1

[aldenquimby]

Steps to reproduce problem

• use node 18 and npm 9
• use express 5.0.0-beta.1 + swagger-ui-express 4.6.2
• run npm ls --omit=dev -json -depth=1

Expected

• npm ls passes

Actual

• npm ls fails with this error:

  "swagger-ui-express": {
    "version": "4.6.2",
    "resolved": "https://registry.npmjs.org/swagger-ui-express/-/swagger-ui-express-4.6.2.tgz",
    "overridden": false,
    "dependencies": {
      "express": {
        "version": "5.0.0-beta.1",
        "invalid": "\">=4.0.0\" from node_modules/swagger-ui-express",
        "problems": [
          "invalid: express@5.0.0-beta.1 /Users/alden/Developer/freewill/freewill-api-v2/src/app/node_modules/express"
        ]
      },
      "swagger-ui-dist": {
        "version": "4.18.3",
        "resolved": "https://registry.npmjs.org/swagger-ui-dist/-/swagger-ui-dist-4.18.3.tgz",
        "overridden": false
      }
    }
  },

Ideas

• express.static works with 5 beta, so add that as an allowed peer dependency