Panic index out of range in gosax.NextAttribute()

[emaffert]

Hi,

I was doing some Fuzzing tests with gosax, and I stumbled upon a panic error when parsing a certain string format and calling NextAttribute(): "<Test t=>"

Full "working" test here: https://go.dev/play/p/Ojae2LGvlGe

The method should return an error and hopefully not panic.

[orisano]

thank you for your reporting