Bump dependencies

Bump dependencies

Fixes panic in UnwrapError (#5)

If an error were passed to eal.UnwrapError that wasn't hashable/comparable, a
panic were raised when we tried to use it as a map key. Now we check in
UnwrapError if the error is comparable before we try to use it as a map key.

If one tries to call RegisterErrorLogFunc with an error that isn't comparable
we'll still raise a panic since until we can log those, there is no point to
call RegisterErrorLogFunc, and that will in most cases happen when initializing
the program.

The only workaround currently is to either ignore log augmentation for those
errors, or change the type to use pointer-receivers to force the creation of
those errors to return a pointer to the un-comparable error struct.

This commit also fixes some comments and another bug in the internal
esl.errorLogger where the "jwt_text" log field contained the error bitfield
and not the jwt.ValidationError text.

Bump dependency versions

Move to echo v4.10.0 and golang-jwt v4.4.3

Bump dependencies

Bump dependencies

Minor cleanup and bump dependencies

Create README.md