MockSet.annotate function handle case when row._annotated_fields is None #59

Job	Run time
Python 3.8 with packages py38-dj22-drf313	58s
Python 3.8 with packages py38-dj22-drf313	58s
Python 3.9 with packages py39-dj22-drf313	58s
Python 3.9 with packages py39-dj22-drf313	58s
Python 3.8 with packages py38-dj32-drf314	1m 36s
Python 3.8 with packages py38-dj32-drf314	1m 36s
Python 3.9 with packages py39-dj32-drf314	51s
Python 3.9 with packages py39-dj32-drf314	51s
Python 3.10 with packages py310-dj32-drf314	55s
Python 3.10 with packages py310-dj32-drf314	55s
Python 3.8 with packages py38-dj42-drf314	53s
Python 3.8 with packages py38-dj42-drf314	52s
Python 3.9 with packages py39-dj42-drf314	57s
Python 3.9 with packages py39-dj42-drf314	57s
Python 3.10 with packages py310-dj42-drf314	1m 24s
Python 3.10 with packages py310-dj42-drf314	1m 24s
Python 3.11 with packages py311-dj42-drf314	1m 33s
Python 3.11 with packages py311-dj42-drf314	1m 33s
Python 3.12 with packages py312-dj42-drf314	1m 8s
Python 3.12 with packages py312-dj42-drf314	1m 8s
Python 3.10 with packages py310-dj50-drf314	57s
Python 3.10 with packages py310-dj50-drf314	57s
Python 3.11 with packages py311-dj50-drf314	56s
Python 3.11 with packages py311-dj50-drf314	56s
Python 3.12 with packages py312-dj50-drf314	1m 20s
Python 3.12 with packages py312-dj50-drf314	1m 20s
	28m 51s

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