Detach the child process when waiting is false

if waiting option is false set stdio to 'ignore' and detached to true so
that the child process is completely detached from the parent and it is
able to continue running after the parent exits.

index.js

@@ -64,6 +64,14 @@ module.exports = (target, opts) => {
 		}
 	}
 
+	if(!opts.wait) {
+		// The child process will NOT stay running in the background after
+		// the parent exits unless it is detached from the parent AND it
+		// ignores the parent's stdio file descriptor 
+		cpOpts.stdio = 'ignore'
+		cpOpts.detached = true
+	}
+
 	args.push(target);
 
 	if (process.platform === 'darwin' && appArgs.length > 0) {

readme.md

@@ -65,7 +65,7 @@ Type: `Object`
 Type: `boolean`<br>
 Default: `true`
 
-Wait for the opened app to exit before fulfilling the promise. If `false` it's fulfilled immediately when opening the app.
+Wait for the opened app to exit before fulfilling the promise. If `false` it's fulfilled immediately when opening the app, and the app is completely detached from the node process that spawned it.
 
 On Windows you have to explicitly specify an app for it to be able to wait.