fix: allow vats under SwingSet to unwrap their promises

Use @agoric/make-promise to make Promises that can be unwrapped
(currently via the HandledPromise shim, but that may change).

packages/SwingSet/package.json

@@ -35,6 +35,7 @@
     "@agoric/evaluate": "^2.2.0",
     "@agoric/eventual-send": "^0.5.0",
     "@agoric/harden": "^0.0.4",
+    "@agoric/make-promise": "^0.0.1",
     "@agoric/marshal": "^0.1.1",
     "@agoric/nat": "^2.0.1",
     "@agoric/swing-store-simple": "^0.1.0",

packages/SwingSet/src/devices/command.js

@@ -1,5 +1,5 @@
 import Nat from '@agoric/nat';
-import makePromise from '../makePromise';
+import makePromise from '@agoric/make-promise';
 
 export default function buildCommand(broadcastCallback) {
   if (!broadcastCallback) {

packages/SwingSet/src/kernel/kernel.js

@@ -3,10 +3,10 @@ import harden from '@agoric/harden';
 import { makeMarshal } from '@agoric/marshal';
 import evaluateProgram from '@agoric/evaluate';
 import { assert, details } from '@agoric/assert';
+import makePromise from '@agoric/make-promise';
 import makeVatManager from './vatManager';
 import { makeLiveSlots } from './liveSlots';
 import { makeDeviceSlots } from './deviceSlots';
-import makePromise from '../makePromise';
 import makeDeviceManager from './deviceManager';
 import { wrapStorage } from './state/storageWrapper';
 import makeKernelKeeper from './state/kernelKeeper';

packages/SwingSet/src/kernel/vatAdmin/vatAdminWrapper.js

@@ -6,7 +6,7 @@
  * device affordances into objects that can be used by code in other vats.
  */
 import harden from '@agoric/harden';
-import makePromise from '../../makePromise';
+import makePromise from '@agoric/make-promise';
 
 export default function setup(syscall, state, helpers) {
   function build(E, D) {