bump version number to 2.2.0-a4 

release picotool version 2.2.0 

release picotool version 2.1.1 

bump picotool version and SDK dependency to 2.1.0 

release 2.0.0 - RP2350 and SDK2.0.0 changes 

set version 1.1.2 

set version 1.1.1 

V1.1.0 updates * Add version command * Fix parsing of ELF where the program header does not directly follow the file header * Add install-ability via `cmake install` * Incorporate slightly modified Win32 libusb find helpers * Add ability to access device using stdio_usb * Add -n option to load to avoid overwriting existing program * Add -f/-F option to force reset a cooperative RP2040 board that isnt in BOOTSEL mode * Add a sudo suggestion when can't connect on linux/macos

Fix detection of unknown flash-size when saving (#17)