v0.3.0.0

• Reprinting m is now Reprinting i m, where i is the input type, which
  must be "String-like" (containers holding some "list" of Chars).
  Previously, i was limited to Text. By default, ByteString, Text and
  String are supported.
• Add an example module taking prompts from the 2017 paper, and rewrite the
  tests to use the definitions in there.
• Support at least GHC 8.6, 8.8, 8.10, 9.0