test

Add v0.3.0 release notes #857

Job	Run time
clang	2m 56s
asan	4m 28s
coverage	4m 3s
docs	56s
flaky	2m 3s
multiplatform-tests (Release, ubuntu-20.04)	4m 44s
python-linter	10s
tsan	3m 8s
multiplatform-tests (Release, ubuntu-22.04)	4m 35s
multiplatform-tests (Release, windows-2019)	16m 6s
uncrustify	56s
multiplatform-tests (Release, windows-2022)	11m 18s
multiplatform-tests (Debug, ubuntu-20.04)	5m 31s
multiplatform-tests (Debug, ubuntu-22.04)	5m 47s
multiplatform-tests (Debug, windows-2019)	10m 58s
multiplatform-tests (Debug, windows-2022)	12m 0s
	1h 29m 39s

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