Version 1.2.0

Changed

• Made zstd support optional. zstd support can be installed with pip install pytiled-parser[zstd]. PyTiled will raise a ValueError explaining to do this if you attempt to use zstd compression without support for it installed. This change is due to the zstd library being a heavy install and a big dependency to make mandatory when most people probably won't ever use it, or can very easily convert to using gzip or zlib for compression.