update async functions

ts/npmci.command.ts

@@ -1,15 +1,13 @@
 import * as plugins from './npmci.plugins'
-import {bash} from './npmci.bash'
+import { bash } from './npmci.bash'
 
-export let command = () => {
-    let done = plugins.q.defer()
-    let wrappedCommand: string = ''
-    let argvArray = process.argv
-    for (let i = 3; i < argvArray.length; i++) {
-        wrappedCommand = wrappedCommand + argvArray[i]
-        if (i + 1 !== argvArray.length) { wrappedCommand = wrappedCommand + ' ' }
-    }
-    bash(wrappedCommand)
-    done.resolve()
-    return done.promise
+export let command = async () => {
+  let wrappedCommand: string = ''
+  let argvArray = process.argv
+  for (let i = 3; i < argvArray.length; i++) {
+    wrappedCommand = wrappedCommand + argvArray[i]
+    if (i + 1 !== argvArray.length) { wrappedCommand = wrappedCommand + ' ' }
+  }
+  await bash(wrappedCommand)
+  return
 }