Update tornado requirement #281

Job	Run time
Tests (klayout27)	1m 5s
Tests (non-🐧) (windows-latest, klayout27)	2m 24s
Tests (klayout28)	1m 8s
Check copyright headers	5s
Tests (non-🐧) (windows-latest, klayout28)	2m 35s
Tests (latest)	1m 6s
Tests (non-🐧) (windows-latest, latest)	1m 38s
Tests (non-🐧) (macos-latest, klayout27)	14m 37s
Check license	3s
Tests (non-🐧) (macos-latest, klayout28)	1m 11s
Shellcheck	3s
Tests (non-🐧) (macos-latest, latest)	1m 2s
Static code analysis	1m 15s
Verify documentation	2m 53s
Verify layer properties	35s
Deploy documentation	15s
Publish test results	8s
Build & Publish kqcircuits 🐍 📦	24s
	32m 27s

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