Update slate-drop-or-paste-images to slate to >= 0.43

[cdunn]

• change -> editor
• Also add context object to insertImage callback. Useful to access original src for example.

[wmertens]

@cdunn Hah, I missed this when I made #40. Looks like we took the same approach, I like your additions. What do you think of how I handle the types?

slate-plugins/packages/slate-drop-or-paste-images/src/index.js

Lines 50 to 68 in 39b68f2

	const insertFn = {files: onInsertFiles, html: onInsertHtml, text: onInsertText}
	/**
	* On drop or paste.
	*
	* @param {Event} event
	* @param {Editor} editor
	* @param {Function} next
	* @return {State}
	*/
	function onInsert(event, editor, next) {
	const transfer = getEventTransfer(event)
	const fn = insertFn[transfer.type]
	if (!fn) return next()
	const range = getEventRange(event, editor)
	return fn(event, editor, next, transfer, range)
	}

[wmertens]

@ianstormtaylor what would it take to merge this? Should the other plugins be upgraded at the same time?

[cameracker]

suggest more concise name of transferTypes or transfers

[cameracker]

a little fuzzy on the _ naming convention, would recommend removing it but won't fight for it

[cameracker]

const filteredFiles = !extensions ? files : files.filter(file => {
  const type = file.type
  const [, etx] = type.split('/')
  return ext && matchExt(ext)
})
if (!filteredFiles.length) { return next() }
for (const file of filteredFiles) {

[cameracker]

I suggest moving the extension checking logic out of the loop. The reason is that this will enable the plugin to return next() if it determines that none of the extensions for the dropped files need to be inserted (IE a no op).