Support Central Package Management

[carlin-q-scott]

Please add support for Central Package Management. Right now the tool throws this exception when using CPM:

Unhandled exception. System.ArgumentException: Value cannot be null or an empty string. (Parameter 'value')
at NuGet.Versioning.NuGetVersion.Parse(String value)
at Depends.Core.DependencyAnalyzer.Analyze(String packageId, String version, String framework) in /home/runner/work/depends/depends/src/Depends.Core/DependencyAnalyzer.cs:line 42
at Depends.Program.GetDependencyGraph(ILoggerFactory loggerFactory) in /home/runner/work/depends/depends/src/Depends/Program.cs:line 128
at Depends.Program.OnExecute() in /home/runner/work/depends/depends/src/Depends/Program.cs:line 114
at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
at System.Reflection.MethodInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
--- End of stack trace from previous location ---
at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.Invoke(MethodInfo method, Object instance, Object[] arguments)
at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.OnExecute(ConventionContext context, CancellationToken cancellationToken)
at McMaster.Extensions.CommandLineUtils.Conventions.ExecuteMethodConvention.<>c__DisplayClass0_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync(String[] args, CancellationToken cancellationToken)
at McMaster.Extensions.CommandLineUtils.CommandLineApplication.ExecuteAsync[TApp](CommandLineContext context, CancellationToken cancellationToken)
at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute[TApp](CommandLineContext context)
at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute[TApp](IConsole console, String[] args)
at McMaster.Extensions.CommandLineUtils.CommandLineApplication.Execute[TApp](String[] args)
at Depends.Program.Main(String[] args) in /home/runner/work/depends/depends/src/Depends/Program.cs:line 16