Remove meta from list of block html tags

ref https://github.com/commonmark/commonmark-spec/issues/527

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fix performance issues when parsing links (#732, #734), backticks, (#733, #736),
   emphases (#735), and autolinks (#737).
 - Allow newline in `<? ... ?>` in an inline context.
+- Allow `<meta>` html tag to appear in an inline context.
 
 
 ## [12.0.2] - 2020-10-23

lib/common/html_blocks.js

@@ -47,7 +47,6 @@ module.exports = [
   'main',
   'menu',
   'menuitem',
-  'meta',
   'nav',
   'noframes',
   'ol',

test/fixtures/markdown-it/commonmark_extras.txt

@@ -296,6 +296,20 @@ a <?
 .
 
 
+Allow meta tag in an inline context, commonmark/commonmark-spec#527.
+.
+City:
+<span itemprop="contentLocation" itemscope itemtype="https://schema.org/City">
+  <meta itemprop="name" content="Springfield">
+</span>
+.
+<p>City:
+<span itemprop="contentLocation" itemscope itemtype="https://schema.org/City">
+<meta itemprop="name" content="Springfield">
+</span></p>
+.
+
+
 Coverage. Directive can terminate paragraph.
 .
 a