Add support for - in convert #5833

Job	Run time
Julia 1 - ubuntu-latest-x86 - General;Benchmarks;FileFormats;Nonlinear	6m 49s
Julia 1 - windows-latest-x64 - Bridges/General	16m 37s
Julia nightly - ubuntu-latest-x64 - Bridges/General	18m 29s
Julia 1.10 - ubuntu-latest-x64 - Bridges/Constraint	7m 48s
Julia nightly - ubuntu-latest-x64 - Bridges/Objective;Bridges/Variable	8m 11s
Julia 1 - ubuntu-latest-x86 - Bridges/Objective;Bridges/Variable	6m 28s
Julia nightly - ubuntu-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	7m 55s
Julia 1.10 - ubuntu-latest-x64 - Bridges/Objective;Bridges/Variable	2m 53s
Julia 1.10 - ubuntu-latest-x64 - Utilities	13m 42s
Julia 1 - windows-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	7m 18s
Julia 1.10 - ubuntu-latest-x64 - Bridges/General	11m 58s
Julia 1.10 - ubuntu-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	4m 17s
Julia 1 - windows-latest-x64 - Test	14m 0s
Julia nightly - ubuntu-latest-x64 - Test	15m 33s
Julia 1 - windows-latest-x64 - Bridges/Constraint	15m 43s
Julia 1 - ubuntu-latest-x86 - Test	18m 17s
Julia 1.10 - ubuntu-latest-x64 - Test	8m 17s
Julia 1 - ubuntu-latest-x86 - Bridges/Constraint	17m 1s
Julia 1 - windows-latest-x64 - Bridges/Objective;Bridges/Variable	5m 42s
Julia 1 - windows-latest-x64 - Utilities	20m 20s
Julia nightly - ubuntu-latest-x64 - Utilities	25m 31s
Julia 1 - ubuntu-latest-x86 - Utilities	23m 57s
Julia nightly - ubuntu-latest-x64 - Bridges/Constraint	18m 53s
Julia 1 - ubuntu-latest-x86 - Bridges/General	19m 48s
	5h 15m 27s

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