0.2.0: Milestone Release

What's Changed

• Add support for converting subflow definition by @HiroyasuNishiyama in #122
• Use GitHub Actions instead of Travis CI by @kazuhitoyokoi in #126
• Remove Travis CI files from node templates by @kazuhitoyokoi in #127
• Update dependency modules by @kazuhitoyokoi in #128
• fix uri-schema handling in WoT TD by @k-toumura in #129

Full Changelog: 0.1.1...0.2.0