Notable Changes:
Diagnostics channel (experimental module)
UUID support in the crypto module
Experimental support for AbortController and AbortSignal

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Maintainer: me @ianchi
Compile tested: head r15324-920b692, aarch64, x86_64
Run tested: (qemu 5.2.0) aarch64, x86_64

Description:
Update to v14.15.3

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Update to v14.15.1

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Update to v12.19.0
Fixes for the removal of MIPS FPU emulator support.

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Add some new APIs
V8 was updated to 7.8.279.23. This includes performance improvements to object
destructuring, RegExp match failures and WebAssembly startup time.

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>

Update to v12.15.0
Support Python3 : https://github.com/openwrt/packages/issues/8893
Preparing to deprecate nosnapshot builds.

Signed-off-by: Hirokazu MORIKAWA <morikw2@gmail.com>