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- Drop support for EOL Python 3.5.
- `Issue 10`_: When converting to 'format'/'pyformat' types, escape existing '%' characters.
- When converting from 'format'/'pyformat' types, set `escape_char=True` to unescape double '%' characters.
.. _`Issue 10`: https://github.com/cpburnz/python-sqlparams/issues/10