Version 1.3

[dusrdev]

Changelog

• Added overloads of Upsert that accept a string key, while the ReadOnlySpan<char> overloads are amazing in specific cases where its use can prevent a string allocation for the lookup, in other places where the input was originally a string that was implicitly converted to a ReadOnlySpan<char> for the parameter, this would've caused a copy to be allocated for the key when the key did not exist. The same scenario will now use the string overload and use it for the key directly, avoiding the intermediate copy.
• Added a ValueTask based GetOrAddAsync method, commonly used in caching scenarios.