update async functions

ts/npmci.install.ts

@@ -2,8 +2,12 @@ import * as plugins from './npmci.plugins'
 import * as configModule from './npmci.config'
 import { bash, bashNoError } from './npmci.bash'
 import { nvmAvailable } from './npmci.bash'
-export let install = (versionArg) => {
-  let done = plugins.q.defer()
+
+/**
+ * Install a specific version of node
+ * @param versionArg
+ */
+export let install = async (versionArg) => {
   plugins.beautylog.log(`now installing node version ${versionArg}`)
   let version: string
   if (versionArg === 'stable') {
@@ -16,30 +20,28 @@ export let install = (versionArg) => {
     version = versionArg
   };
   if (nvmAvailable) {
-    bash(`nvm install ${version} && nvm alias default ${version}`)
+    await bash(`nvm install ${version} && nvm alias default ${version}`)
     plugins.beautylog.success(`Node version ${version} successfully installed!`)
   } else {
     plugins.beautylog.warn('Nvm not in path so staying at installed node version!')
   };
-  bash('node -v')
-  bash('npm -v')
+  await bash('node -v')
+  await bash('npm -v')
   // lets look for further config
   configModule.getConfig()
-    .then(configArg => {
+    .then(async configArg => {
       plugins.beautylog.log('Now checking for needed global npm tools...')
       for (let npmTool of configArg.globalNpmTools) {
         plugins.beautylog.info(`Checking for global "${npmTool}"`)
-        let whichOutput = bashNoError(`which ${npmTool}`)
+        let whichOutput: string = await bashNoError(`which ${npmTool}`)
         let toolAvailable: boolean = !((/not\sfound/.test(whichOutput)) || whichOutput === '')
         if (toolAvailable) {
           plugins.beautylog.log(`Tool ${npmTool} is available`)
         } else {
           plugins.beautylog.info(`globally installing ${npmTool} from npm`)
-          bash(`npm install ${npmTool} -q -g`)
+          await bash(`npm install ${npmTool} -q -g`)
         }
       }
       plugins.beautylog.success('all global npm tools specified in npmextra.json are now available!')
-      done.resolve()
     })
-  return done.promise
 }