Bump version to 3.3.3

Author: waylan

docs/change_log/index.md

@@ -3,7 +3,7 @@ title: Change Log
 Python-Markdown Change Log
 =========================
 
-Under development: version 3.3.3 (a bug-fix release).
+Oct 25, 2020: version 3.3.3 (a bug-fix release).
 
 * Unify all block-level tags (#1047).
 * Fix issue where some empty elements would have text rendered as `None` when using `md_in_html` (#1049).

markdown/__meta__.py

@@ -26,7 +26,7 @@
 # (1, 2, 0, 'beta', 2) => "1.2b2"
 # (1, 2, 0, 'rc', 4) => "1.2rc4"
 # (1, 2, 0, 'final', 0) => "1.2"
-__version_info__ = (3, 3, 2, 'final', 0)
+__version_info__ = (3, 3, 3, 'final', 0)
 
 
 def _get_version(version_info):