Express and expect declared as runtime dependencies

[jekh]

I noticed when upgrading hellosign-sdk recently that express and expect are both declared as depedencies, rather than devDependencies. This causes a lot of unwanted runtime deps to get pulled into apps that use hellosign-sdk.

It looks like expect is only used in tests, but express is used in server.js for what looks like a Hello World example. Maybe server.js should move into the test/ folder, if it's used at all?

I'm happy to put together a quick PR, too.

 "dependencies": {
    "expect": "^24.9.0",
    "express": "^4.17.1",
    "form-data": "^2.3.2",
    "when": "~3.1.0"
  },

[gabegorelick]

Related PR: #99

[miguelriosoliveira]

Please accept PR #99 🙏
The warnings that hellosign-sdk brings to the project are really annoying 😪