Closing delimited * incorrect for consecutive ocurrences

[damianon]

Describe the bug
When ** is used consecutively the closing delimiter is recognised incorrectly

To Reproduce
b**o****o**k turns into b<strong>o**</strong>o**k

Interesting enough the Marked Demo Page produces a different result: https://spec.commonmark.org/dingus/?text=b**o****o**k

Version: 0.8.0 (previously 0.7.0 with the same bug)

Expected behavior
both o's should get a separate <strong>

Tried this online editor and it works correctly: https://dillinger.io/

[UziTech]

*'s are supposed to only be terminated by the same number of *'s.

marked demo

looks like this has a failing test

marked/test/specs/commonmark/commonmark.0.29.json

Lines 3366 to 3374 in a42413d

	{
	"markdown": "*foo**bar***\n",
	"html": "<p><em>foo<strong>bar</strong></em></p>\n",
	"example": 414,
	"start_line": 6902,
	"end_line": 6906,
	"section": "Emphasis and strong emphasis",
	"shouldFail": true
	},