Log Message:
print/ruby-prawn: update to 2.3.0

Update ruby-prawn to 2.3.0.

2.3.0 (2020-08-01)

This is release includes one new exiting feature: OTF fonts support.  You
can use them exactly as you'd use TTF fonts.  Thanks for this to @camertron.

Another notable change is the list of supported Rubies.  Since last release
a few new versions came out and a few reached their EOL.

Other than that a number of bugs have been fixed.  See Changelog for the
details.