loosen restrictions on Option.TryGetValue

[FreeApophis]

Example

for (var module = Create(offset); moduleName.TryGetValue(out var m); m.GetNext())
{
    yield return module;
}

[bash]

We decided in an IRL conversatoin that:

• We allow TryGetValue in for loops in iterators.
• We allow the error to be suppressed using #pragma.