Release 1.1.0

• Fixed an issue in the Nickname profile implementation that trimmed
  extra leading/trailing white space beyond the Zs
  category prescribed in RFC 8266. Python treats certain
  Unicode control characters such as '\n' and '\t' as white space. If
  these appeared as leading/trailing spaces in a Nickname string, they
  were stripped. With this release, the Nickname profile will raise a
  UnicodeEncodeError DISALLOWED/controls if any control
  characters are encountered. (Issue #29)
• Update internal tables for Unicode 15.1.
• Add Python 3.13-dev to CI build environment.
• Change format of README and CHANGELOG files to Markdown.
• Drop support for Python 3.3 and 3.4.