[Dev] Glob for tests

[ocots]

Permit julia --project=@. -e 'using Pkg; Pkg.test(; test_args=["suite/modelers"])' to tests everything in the directory, instead of julia --project=@. -e 'using Pkg; Pkg.test(; test_args=["suite/modelers/*"])'.

[ocots]

Let this works too: julia --project=@. -e 'using Pkg; Pkg.test(; test_args=["test/suite/modelers"])'.