Add noexcept specifier to move assignment operator and destructor in Span class

ex01/src/Span.cpp

@@ -31,7 +31,7 @@ Span &Span::operator=(const Span &other)
     return *this;
 }
 
-Span &&Span::operator=(Span &&other)
+Span &&Span::operator=(Span &&other) noexcept
 {
     if (this != &other)
     {
@@ -42,7 +42,7 @@ Span &&Span::operator=(Span &&other)
     return std::move(*this);
 }
 
-Span::~Span() {}
+Span::~Span() noexcept{}
 
 void Span::addNumber(int number)
 {