Adding Promise overload type to functions

[jpmonette]

Resolves #196

• Backward compatible
• Simply remove successCB and errorCB from the existing functions to return Promise
• Deprecating need for promiser and promiserNoRejection

---

Example:

before

import { query } from "./react.force.net";
import { promiser } from "./react.force.util";

type Accounts = Array<{ Id: string }>;

// before sync
query<Accounts>(
  "SELECT Id FROM Account",
  (accounts) => console.log(accounts),
  (err) => console.error(err),
);

// before async
const queryAsync = promiser(query);

queryAsync("SELECT Id FROM Account") // typing has been stripped :(
  .then((accounts: Accounts) => console.log(accounts))
  .catch((err) => console.error(err));

after

import { query } from "./react.force.net";

type Accounts = Array<{ Id: string }>;

// after sync (no change)
query<Accounts>(
  "SELECT Id FROM Account",
  (accounts) => console.log(accounts),
  (err) => console.error(err),
);

// after async
query<Accounts>("SELECT Id FROM Account") // typing works! 🚀
  .then((accounts) => console.log(accounts))
  .catch((err) => console.error(err));

try {
  const accounts = await query<Accounts>("SELECT Id FROM Account"); // typing works! 🚀
  console.log(accounts);
} catch (e) {
  console.error(e);
}

[jpmonette]

@wmathurin As discussed in #196, here's the PR introducing typed promises for each functions. This is pretty close to "done", so would be keen to hear any suggestion.