Release v0.2.3

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[0.2.3] - 2023-06-07

Remembered to include py.typed in the package, and fixed a bug with the
escape_format function. Furthermore, identified a major bug with chained
escapes, which will be fixed in the next major update as it may require breaking
changes.

Added

• Added py.typed - this time for real
• Added unit tests

Changed

• Updated dependencies

Fixed

• Fixed a bug where escape_format was forcing any replaced substrings to be
  lowercase. The casing in the output now matches the input.