`NumberFormatException` from SnakeYAML due to int overflow for corrupt YAML version

(note: found by OSS-Fuzz -> https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56902)

Looks like SnakeYAML's YAML directive handling assumes (not unreasonably) that the YAML version should be (or consist of) regular `int`s. But if input is crafted to have number bigger than 32-bit `int`, there's a `NumberFormatException`.
Input OSS-Fuzz generated is:

```
%YAML 1.9224775801
```
