Bug fixes

• (Fuzzing) An integer-overflow bug from an inclusive range in get_bits is fixed (#963).
• (Fuzzing) Nested functions marked private now properly cause compilation errors (#993).
• Passing function as a function pointer into a function in an imported module now correctly encapsulates the current environment into the generated function pointer (thanks @dcihlar #976). The same for passing a closure (thanks again, @dcihlar #979).
• Revised epsilon-based floating-point comparisons (thanks @HactarCE #981).
• Unneeded optional dependencies are no longer pulled in with features (thanks @HactarCE #987).
• Engine::collect_fn_metadata now properly includes the namespaces of functions in static modules (thanks @therealprof and @elkowar #992).

Enhancements

• Improve display of function call errors by displaying the caller function's source together with line number info (thanks @rhizoome and @HactarCE #988).
• source and position in NativeCallContext are now fn_source and call_position. A new method call_source is added to return the source (if any) of the caller function (thanks @rhizoome and @HactarCE #989).
• The &&, || and ?? operators are optimized to allow efficient chaining (#994).