ISibboI

Instead of converting numbers with `as`, the newly stabilized `try_from` should be used.

Parsing is done via multiple caching vectors. Those could be avoided by using iterators.

Get rid of all `unwrap()`s

1

At some point in the future, this crate should use no unwraps, neither in code nor tests nor documentation.

Automatically convert to string

2

If an operator that can handle either strings or other types is passed a mixture of strings and other types, then it should convert the other types to string automatically....

Support size one tuples

2

Tuples are required to be created with the comma operator as of now. It should be possible to create size one tuples using parentheses as well.

Not sure if this is supported right now, but it should be at some point.

Blocked by #23

Give users that use evalexpr to work on a large amount of variables a standard syntax to modularize them. This should be done with namespaces. Example: `a::b::c` is the variable...

For numeric or boolean serde types emit the correct value. But what happens with strings? Should they just be interpreted as string values, or should they be evaluated without context?...