build: bump version number to 13.5.0 (#977) #1796

Job	Run time
download_test_data	4s
build (macos-latest)	3m 42s
java_matrix	2s
build (ubuntu-latest)	3m 30s
unit_tests (25)	3m 44s
unit_tests (21)	4m 6s
test_decoder	2m 36s
spotbugs	6m 14s
test_clara	4m 11s
dependency_analysis	55s
test_run-groovy	57s
test_coatjava (ubuntu-latest, kpp)	2m 55s
test_coatjava (ubuntu-latest, eb-eg)	2m 22s
test_coatjava (ubuntu-latest, eb-ep)	2m 41s
test_coatjava (ubuntu-latest, eb-eftpi)	3m 34s
test_coatjava (ubuntu-latest, eb-enc)	1m 49s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	2m 58s
release_build	0s
test_coatjava (ubuntu-latest, eb-epc)	1m 55s
generate_documentation	1m 5s
deploy_web_pages	10s
final	4s
	49m 34s

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