v0.4.0 release

Evolution summary:

core

update

• LICENSE: now APACHE 2.0

cable

new

• Orbtrace

parts

update

• gowin: checks if fs is targeted for the connected device
• xilinx, lattice, efinix: add verify write to flash
• xilinx, lattice, efinix, ice40: add option to dump flash area

fix

• ftdi: with libftdi >= 1.5 reattach hack is no more required

Contributors:

• Vegard Storheil Eriksen (@zyp)