v1.1.0: release 1.1.0

Have been tested with
* OpenResty 1.17.8 + OpenSSL 1.1.1
* OpenResty 1.15.8 + OpenSSL 1.0.2

v1.0.2

prepare to release 1.0.2

v1.0.1

bump version 1.0.1

v1.0.0

change: switch to semver

v0.05

release v0.05

Use this version if you need to support OpenSSL 1.1.0

v0.04

style: tweak code style.

v0.03

doc: use SHA256 instead of SHA1 in the example.