v1.18.0

v1.18.0 (2021-01-13)

Full Changelog

Closed issues:

• Run github actions CI with ruby 3.0 #210
• keywords property added to Sticker event object #204
• Support Flex Message Update 2 #202

Merged pull requests:

• support test webhook endpoint #213 (ryota-sakamoto)
• support set webhook endpoint #212 (ryota-sakamoto)
• Add ruby v3.0 for pull request CI #211 (toduq)
• support get webhook endpoint #209 (ryota-sakamoto)