TryFrom<ToType, FromType> should be satisfied for all From<ToType, FromType>

[danakj]

Rust provides blanket impl of TryFrom when From is satisfied: https://doc.rust-lang.org/stable/src/core/convert/mod.rs.html#762 which returns an error type of Infallible.

Similarly, sus::construct::TryFrom should be satisfied, and it should be possible to call try_from. We can provide an overload which does the same and returns Result<ToType, Infallible>.