frozenlist 1.1.0 release

Features

• Add support for hashing of a frozen list.
  #136 <https://github.com/aio-libs/frozenlist/issues/136>_

• Support Python 3.8 and 3.9.

• Provide wheels for aarch64, i686, ppc64le, s390x architectures on
  Linux as well as x86_64.