Add FF4 branch with changes to remove some unencodable characters #146

Job	Run time
Test hosting with 3.11 on ubuntu-latest	6h 0m 13s
Test Python 3.8 ubuntu-latest	3m 56s
Test Python 3.9 ubuntu-latest	3m 48s
Test Python 3.10 ubuntu-latest	3m 45s
Test Python 3.11 ubuntu-latest	3m 54s
Test Python 3.8 windows-latest	5m 30s
Test Python 3.11 windows-latest	8m 35s
Test Python 3.11 macos-latest	2m 22s
	6h 32m 3s

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