fix(syncer): restore tiddlerInfo param to saveTiddler

[danielo515]

This was added on a159b5b and lost in #4373.
Will be a good idea to introduce tests against this kind of changes

[Jermolene]

Thanks @danielo515

[Jermolene]

@danielo515 this PR appears to be broken; I'm seeing:

 syncer-server-filesystem: Dispatching 'save' task: $:/StoryList 
$:/core/modules/syncer.js:587
			tiddlerInfo: self.tiddlerInfo[task.title]
			                              ^

ReferenceError: task is not defined
    at SaveTiddlerTask.run ($:/core/modules/syncer.js:587:34)
    at Syncer.processTaskQueue ($:/core/modules/syncer.js:478:9)
    at Function.<anonymous> ($:/core/modules/syncer.js:90:9)
    at $tw.Wiki.exports.dispatchEvent ($:/core/modules/wiki.js:133:13)
    at $:/core/modules/wiki.js:166:10
    at processTicksAndRejections (internal/process/task_queues.js:76:11)

[Jermolene]

See 2649d2f for fix

[danielo515]

Thanks for the fix @jeremy