Configure awaitWriteFinish for chokidar (#5774)

* Configure `awaitWriteFinish` for chokidar

* Enable `awaitWriteFinish` on Windows only

Author: bradlc

src/cli.js

@@ -700,6 +700,13 @@ async function build() {
 
     watcher = chokidar.watch([...contextDependencies, ...extractFileGlobs(config)], {
       ignoreInitial: true,
+      awaitWriteFinish:
+        process.platform === 'win32'
+          ? {
+              stabilityThreshold: 50,
+              pollInterval: 10,
+            }
+          : false,
     })
 
     let chain = Promise.resolve()

src/lib/setupWatchingContext.js

@@ -84,6 +84,13 @@ function rebootWatcher(context, configPath, configDependencies, candidateFiles)
 
     watcher = chokidar.watch([...candidateFiles, ...configDependencies], {
       ignoreInitial: true,
+      awaitWriteFinish:
+        process.platform === 'win32'
+          ? {
+              stabilityThreshold: 50,
+              pollInterval: 10,
+            }
+          : false,
     })
 
     setWatcher(context, watcher)