Differences between 3.0 and 3.1

* JSON::Validator version: 5.14
* Perl version: 5.32 (+ others)
* Operating system: Centos 7 (+others Fedora 39, ubuntu 22, ...)

### Steps to reproduce the behaviour
Valid 3.0.1 data is failing to validate,

### Expected behavior
It should validate

### Actual behavior
It doesn't.

Between 3.0 and 3.1 the meaning of `exclusiveMinimum` and `exclusiveMaximum` changed. The behaviour of the code is as for 3.1.

Versions of openapi before 3.1 used an older version of the JSON schema. Specifically it used to be that `exclusiveMinmum` was a boolean rather than a value. The effect is that pre 3.1 schemas are checked against "true" which equates to 1 in perl terms.