Fix li elements

Closes GH-5.

Reviewed-by: Titus Wormer <[email protected]>

Author: gorango

lib/index.js

@@ -106,6 +106,7 @@ const blockOrCaption = convertElement([
   'hr', // Flow content
   'html', // Page
   'legend', // Flow content
+  'li', // Lists (as `display: list-item`)
   'listing', // Flow content (legacy)
   'main', // Flow content
   'menu', // Lists

test.js

@@ -358,6 +358,13 @@ test('non-normal white-space', async function (t) {
       '\tDelta \n\techo\t\n'
     )
   })
+
+  await t.test('should support `li` elements', async function () {
+    assert.equal(
+      toText(h('ul', [h('li', 'Foxtrot'), h('li', 'Golf')])),
+      'Foxtrot\nGolf'
+    )
+  })
 })
 
 test('more whitespace', async function (t) {