feat(toys-release): The gen-config tool now generates git_user_name a… #928

Job	Run time
tests (ubuntu-latest, 3.0, --test-all)	3m 47s
tests (macos-latest, 3.4, --test-all --no-test-tools --no-test-release)	1m 38s
tests (ubuntu-latest, 3.2, --test-all)	3m 18s
tests (ubuntu-latest, 3.4, --test-all)	3m 45s
tests (macos-latest, 2.7, --test-all --no-test-tools --no-test-release)	3m 43s
tests (ubuntu-latest, 3.4, --rubocop-all --yard-all --build-all)	1m 23s
tests (ubuntu-latest, 2.7, --test-all)	4m 17s
tests (windows-latest, 2.7, --test-all --no-test-tools --no-test-release)	10m 6s
tests (ubuntu-latest, 3.3, --test-all)	3m 47s
tests (windows-latest, 3.4, --test-all --no-test-tools --no-test-release)	6m 31s
tests (ubuntu-latest, 3.1, --test-all)	3m 47s
tests (ubuntu-latest, jruby, --test-all --no-test-tools --no-test-release)	8m 49s
	54m 51s

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