bump version number to 0.0.9, v0.0.8 has been published to crates.io
bump version number to 0.0.9, v0.0.8 has been published to crates.io

petehayes102/mdBook,azerupi/mdBook,azerupi/mdBook,superstring/mdBook,superstring/mdBook,superstring/mdBook,petehayes102/mdBook,superstring/mdBook,petehayes102/mdBook,azerupi/mdBook,azerupi/mdBook,petehayes102/mdBook