Add support for - in convert #5829

Job	Run time
Julia 1 - windows-latest-x64 - Bridges/Objective;Bridges/Variable	8m 31s
Julia 1.10 - ubuntu-latest-x64 - Bridges/Objective;Bridges/Variable	3m 4s
Julia 1.10 - ubuntu-latest-x64 - Bridges/Constraint	8m 27s
Julia 1.10 - ubuntu-latest-x64 - Bridges/General	12m 22s
Julia 1 - ubuntu-latest-x86 - General;Benchmarks;FileFormats;Nonlinear	9m 36s
Julia nightly - ubuntu-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	5m 35s
Julia nightly - ubuntu-latest-x64 - Bridges/Objective;Bridges/Variable	6m 9s
Julia 1.10 - ubuntu-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	4m 14s
Julia 1 - ubuntu-latest-x86 - Bridges/Constraint	16m 55s
Julia 1 - windows-latest-x64 - General;Benchmarks;FileFormats;Nonlinear	8m 22s
Julia 1 - windows-latest-x64 - Bridges/Constraint	14m 45s
Julia 1 - ubuntu-latest-x86 - Bridges/General	20m 5s
Julia nightly - ubuntu-latest-x64 - Bridges/Constraint	19m 27s
Julia nightly - ubuntu-latest-x64 - Bridges/General	16m 24s
Julia 1 - windows-latest-x64 - Test	14m 17s
Julia nightly - ubuntu-latest-x64 - Test	13m 28s
Julia nightly - ubuntu-latest-x64 - Utilities	24m 55s
Julia 1.10 - ubuntu-latest-x64 - Test	8m 5s
Julia 1.10 - ubuntu-latest-x64 - Utilities	13m 22s
Julia 1 - ubuntu-latest-x86 - Test	16m 5s
Julia 1 - windows-latest-x64 - Bridges/General	16m 42s
Julia 1 - ubuntu-latest-x86 - Bridges/Objective;Bridges/Variable	5m 44s
Julia 1 - ubuntu-latest-x86 - Utilities	24m 44s
Julia 1 - windows-latest-x64 - Utilities	24m 0s
	5h 15m 18s

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