all: release v0.23.0

build: fix build-library subcommand

This subcommand has been broken for a while, since libraries also use
the CPU flag. This commit fixes this.

Previously, libraries were usable for most Cortex-M cores. But with the
addition of the CPU field, I've limited it to three popular cores: the
Cortex-M0 (microbit), Cortex-M0+ (atsamd21), and Cortex-M4 (atsamd21,
nrf52, and many others).

In the future we might consider also building libraries for the current
OS/arch so that libraries like musl are already precompiled.

all: release v0.21.0

transform (coroutines): move any misplaced entry-block allocas to the…

… start of the entry block before lowering

main: release version 0.19.0

Update README.md

all: release v0.17.0

main: release 0.16.0

Prepare for 0.15.0 release

Signed-off-by: deadprogram <[email protected]>

main: release 0.14.1

Signed-off-by: deadprogram <[email protected]>