reformat changelog

new release v0.3.3: relax lower bound of the base library version

release v0.3.2

packaging/CI: changes to incorporate stackage lts 13.22

FileTransfer: haddock documentation for DirectoryMode type

Prepare for 0.2.1

base constraint on 0.2.0 is too constraining for wormhole-client

release guideline

Release 0.1.0

- include LICENSE file
- add CHANGELOG
- require spake2 0.4.1 or better
- provide package description