fix(spawn): add shell:true on windows

Closes neoclide/coc-prettier#178

Latest version of Node.js needs to set `shell: true` to spawn option

- node-red/node-red#4652
- microsoft/rushstack#4637

src/extension/installer.ts

@@ -238,6 +238,7 @@ export class Installer extends EventEmitter implements IInstaller {
       this.log(`Installing dependencies by: ${this.npm} ${args.join(' ')}.`)
       const child = child_process.spawn(this.npm, args, {
         cwd: folder,
+        shell: process.platform === 'win32',
         env: Object.assign(process.env, { NODE_ENV: 'production' })
       })
       this.readLines('[npm stdout]', child.stdout)

src/handler/refactor/search.ts

@@ -19,7 +19,7 @@ const controlCode = '\x1b'
 class Task extends EventEmitter {
   private process: ChildProcess
   public start(cmd: string, args: string[], cwd: string): void {
-    this.process = spawn(cmd, args, { cwd })
+    this.process = spawn(cmd, args, { cwd, shell: process.platform === 'win32' })
     this.process.on('error', e => {
       this.emit('error', e.message)
     })

src/list/commandTask.ts

@@ -35,7 +35,7 @@ export default class CommandTask extends EventEmitter implements ListTask {
 
   private start(): void {
     let { cmd, args, cwd, onLine } = this.opt
-    let proc = spawn(cmd, args, { cwd: cwd || workspace.cwd, windowsHide: true })
+    let proc = spawn(cmd, args, { cwd: cwd || workspace.cwd, windowsHide: true, shell: process.platform === 'win32' })
     this.disposables.push({
       dispose: () => {
         proc.kill()