Add Meziantou.Analyzer.Annotations package #906

Job	Run time
compute_package_version	3s
build_and_test (ubuntu-latest, Debug, roslyn3.8)	1m 53s
build_and_test (ubuntu-latest, Debug, roslyn4.2)	2m 0s
build_and_test (ubuntu-latest, Debug, roslyn4.4)	2m 29s
build_and_test (ubuntu-latest, Debug, default)	1m 58s
build_and_test (ubuntu-latest, Release, roslyn3.8)	2m 31s
build_and_test (ubuntu-latest, Release, roslyn4.2)	2m 27s
build_and_test (ubuntu-latest, Release, roslyn4.4)	2m 32s
build_and_test (ubuntu-latest, Release, default)	2m 31s
build_and_test (windows-latest, Debug, roslyn3.8)	5m 54s
build_and_test (windows-latest, Debug, roslyn4.2)	5m 21s
build_and_test (windows-latest, Debug, roslyn4.4)	5m 45s
build_and_test (windows-latest, Debug, default)	5m 5s
build_and_test (windows-latest, Release, roslyn3.8)	9m 0s
build_and_test (windows-latest, Release, roslyn4.2)	5m 53s
build_and_test (windows-latest, Release, roslyn4.4)	7m 6s
build_and_test (windows-latest, Release, default)	5m 6s
create_nuget	2m 11s
validate_nuget	1m 17s
deploy	19s
create_release	0s
	1h 11m 21s

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