chore: bump version to 1.2.1 #34

Job	Run time
🔨 Build distribution	22s
🧹 Pre-commit	35s
🧪 Unit tests (3.12)	28s
🧪 Installation test (3.10)	27s
🧪 Unit tests (3.13)	30s
🧪 Installation test (3.9)	35s
🧪 Unit tests (3.9)	32s
🧪 Installation test (3.11)	26s
🧪 Installation test (3.12)	28s
🧪 Unit tests (3.10)	32s
🧪 Unit tests (3.11)	25s
🧪 Installation test (3.13)	24s
🧪 E2E tests (main, 3.11)	5m 13s
🧪 E2E tests (dev, 3.10)	5m 14s
🧪 E2E tests (dev, 3.9)	5m 36s
🧪 E2E tests (dev, 3.12)	5m 35s
🧪 E2E tests (main, 3.13)	4m 39s
🧪 E2E tests (dev, 3.11)	5m 20s
🧪 E2E tests (main, 3.9)	4m 38s
🧪 E2E tests (dev, 3.13)	6m 40s
🧪 E2E tests (main, 3.10)	4m 48s
🧪 E2E tests (main, 3.12)	5m 1s
📦 Publish on TestPyPI	0s
📦 Publish tagged releases to PyPI	-1s
	58m 27s

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