chore(main): release lib/flattening 0.1.3 #6919

Job	Run time
benchmark tests	4m 30s
Protocol Buffer Lint and Gencode Up-to-date check	22s
go (examples)	58s
go (sdk)	1m 45s
go (service)	3m 10s
image build	1m 42s
go (lib/ocrypto)	40s
go (lib/fixtures)	40s
integration tests	4m 27s
go (lib/flattening)	50s
license check	50s
otdfctl e2e tests	4m 42s
platform-xtest / cross-client-test	8m 54s
ci	1s
	33m 31s

Provide feedback