Release 2.2.0

Changes since 2.1.0:

• 0191d62 increase version
• 0b800d9 update action workflow
• bf7a749 update action workflow
• 23e3082 update action workflow
• c9cc8dd update action workflow
• 9fb5ac6 update action workflow
• c8edcfc update action workflow
• 0784385 update action workflow
• e4f4498 update action workflow
• 1c9c9f7 increase version
• 64f1ce5 update action workflow
• 156b2a7 decrease version
• 7ed2f44 update action workflow
• 3a1b8cf increase version
• 458b6cb update action workflow
• e85b290 update readme and package info
• f8d2efa replace travis with github actions
• fd69784 update dependencies and use "mkdirp" instead of "mkdir -p"