add sorting strings by ascii order and maybe other type-respected default sorting behaviours?

[sidazhang123]

Many languages and packages support this feature, so that it would be much more convenient not self-making an index in dynamic get(). Thanks.

[brunodmn]

Hi, just needed to sort dates, and also included string support.

I opened a pull request #3;

[atreeon]

I had done the same thing without seeing this comment, I've created a pull request #4 so whoever looks at it has two to choose from! Mine does have some breaking changes though as I made it all a bit more type safe.