update to use mm2_stop

[gcharang]

import init, {mm2_stop} from "./path/to/mm2.js";

[smk762]

Currently, the "stop" button does appear to close the DB and connection to mm2, though upon restarting I noticed that the task ID index for methods like

{
  "userpass": "testpsw",
  "method": "task::enable_z_coin::init",
  "mmrpc": "2.0",
  "params": {
    "ticker": "ARRR",
    "activation_params": {
      "mode": {
        "rpc": "Light",
        "rpc_data": {
          "electrum_servers": [
            {
              "url": "electrum3.cipig.net:30008",
              "protocol": "WSS"
            }
          ],
          "light_wallet_d_servers": [
            "http://pirate.battlefield.earth:8581"
          ]
        }
      }
    }
  }
}

continues to increment from where it left off rather than going back to zero. I'm not sure if this is intended behaviour for wasm, but though worth mentioning just in case.