Test

Allow configuring empty_value for SplitPhoneNumberField #667

Job	Run time
Python 3.12 /	2m 46s
Python 3.14-dev /	1m 44s
Python 3.13 /	2m 29s
Python 3.9 /	1m 27s
Python 3.11 /	1m 8s
Python 3.10 /	2m 15s
Indicate completion to coveralls.io	9s
	11m 58s

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