Release 1.3.0

What's Changed

• Add BLE connection binary sensor for Niimbot by @eigger in #31
• Feat/add sensor icon by @eigger in #32
• Feat/add auto discovery by @eigger in #33
• Fix/minor bug by @eigger in #34
• Add print duration sensor for Niimbot devices by @eigger in #35

Full Changelog: 1.2.9...1.3.0