Case insensitive `key` and `value` tags

[ArneMancofi]

In AlbanianXrm.PowerPlatform.JsonConverters.AttributeCollectionConverter.Read(...), shouldn't the switch on the tag be case insensitive, for instance by replacing

switch (str)
{
  case "key":
    // ...
  case "value":
    // ...
}

with

switch (str.ToLowerInvariant())
{
  case "key":
    // ...
  case "value":
    // ...
}

?

[BetimBeja]

Hi @ArneMancofi, in which case would the key and value be different than LowerCase?

I guess this "fix" wouldn't be a huge ask anyway. I will push this together with #1 as soon as we are ready.