copilot-c99 3.9

Only display out-of-date packages.

6 Reverse deps	Accepted versions
arduino-copilot	(==3.9.*)
copilot	==3.9.*
copilot-cbmc	>=2.2.1
copilot-frp-sketch	(==3.7.*)
sketch-frp-copilot	(==3.9.*)
zephyr-copilot	(==3.9.*)