Fuzz slightly on CI

[Dinnerbone]

The other fuzz targets don't work, but we can at least run this for 2 minutes and see what happens

[torokati44]

The other fuzz targets don't work

Even after #63? 🤔

[Dinnerbone]

The other fuzz targets don't work

I haven't updated this PR yet! Working on it!

[Dinnerbone]

Test based on the fuzz it found already:

    #[test]
    fn fuzz_b0e663fb5e6fa41096be51b5a425a9219502040b() {
        let input = &[
            0x01, // str len, size of 0
            0x11, // type marker: dictionary
            0x03, // new object, size of 1 (object ID becomes 0)
            0x01, // weak keys: 1 (true?)
            0x04, // key type marker: integer
            0x01, // key value: 1
            0x0a, // value type marker: object
            0x00, // value is reference to object ID 0
        ];
        let body = AMF3Decoder::default().parse_body(input);
    }