Prepare for Apache Mynewt 1.13.0 release #229

Job	Run time
populate-targets	6s
newt dump (bleprph-nrf52840pdk, ubuntu-latest)	24s
newt dump (bleprph-nrf52840pdk, windows-latest)	1m 1s
newt dump (bleprph-nrf52840pdk, macos-latest)	20s
newt dump (boot-nrf52dk, ubuntu-latest)	22s
newt dump (boot-nrf52dk, windows-latest)	1m 6s
newt dump (boot-nrf52dk, macos-latest)	23s
newt dump (btshell-nrf52840pdk, ubuntu-latest)	21s
newt dump (btshell-nrf52840pdk, windows-latest)	2m 1s
newt dump (btshell-nrf52840pdk, macos-latest)	18s
newt dump (btshell-nrf52dk, ubuntu-latest)	21s
newt dump (btshell-nrf52dk, windows-latest)	1m 21s
newt dump (btshell-nrf52dk, macos-latest)	51s
newt dump (my_blinky_sim, ubuntu-latest)	22s
newt dump (my_blinky_sim, windows-latest)	1m 3s
newt dump (my_blinky_sim, macos-latest)	28s
	10m 48s

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