all: add support for unordered list with '-'

The unordered list item with hyphen ('-') cause too much confusion and
inconsistency, nevertheless most of still use it.

Case one, given the following markup,

```
- Item 1
+
"A line
of quote"
-- Author
```

Is the "Author" the sub item in list or we are parsing author of quote
paragraph?

Case two, the writer want to write em dash (`—` in HTML Unicode) but
somehow the editor wrap it and start in new line.

As a reminder, the official documentation only recommend using hyphen for
simple list item [1].

[1] https://docs.asciidoctor.org/asciidoc/latest/lists/unordered/#basic-unordered-list

1 files changed, 0 insertions, 2 deletions

diff --git a/document_parser.go b/document_parser.go
index 3ccfa0f..db2dec1 100644
--- a/document_parser.go
+++ b/document_parser.go
@@ -841,8 +841,6 @@ func (docp *documentParser) parseListBlock() (el *element, line []byte) {
 				lineKindEmpty,
 				[]int{
 					lineKindListContinue,
-					elKindListOrderedItem,
-					elKindListUnorderedItem,
 					elKindListDescriptionItem,
 				})
 			el.postParseParagraph(nil)