add support for go1.18 fuzzing; fixes (#20)

version 1.3.0

version 1.2.1

Merge pull request #13 from jmank88/ci

replace 1.x with explicit 1.9.x and '1.10'

Merge pull request #11 from jmank88/fuzz

github.com/dvyukov/go-fuzz

leverage reflect.MakeMapWithSize introduced in go1.9

readme