Port add fileReadDelay to inventoryImports config

Fix the inventoryImports client side code never receiving the script
output by specifying fileReadDelay and thereby getting the old
behaviour.  This broke with the introduction of the tail mode script
output mode which requires a newline to be written at the end of
the output.

This is a port of d810b56.

CHANGELOG.md

@@ -73,6 +73,8 @@ Version 1.2.3
   exceeding the default 100kb limit on JSON payloads.
 - Fixed the command inventoryImport sends referencing player instead of
   character, and trying to count the non-existant quick bar slots.
+- Fixed inventoryImport never receiving the script output after the default
+  mode for reading script output changed to tail mode.
 
 
 Version 1.2.2

sharedPlugins/inventoryImports/config.js

@@ -17,4 +17,5 @@ module.exports = {
 	description: "Clusterio plugin to fill character logistic slots with master imports",
 	// We'll send everything in this file to your stdin. Beware.
 	scriptOutputFileSubscription: "inventoryImports.txt",
+	fileReadDelay: 100,
 }