Release 1.1.0

Changes in this release:

✨ New Features

• 4c877b5 - add the shift subtitles tool (commit by @mdaubie)

♻️ Refactors

• 37c516c - use generic types in the relevant Parser and Serializer methods, as to make their use more strict and safe (commit by @mdaubie)
• cfcc9b2 - suppress impossible IllegalAccessException in attribute serialization and use safe cast in list serialization (commit by @mdaubie)

📝 Documentation Changes

• 93aa85c - document the serializer and parser classes (commit by @mdaubie)
• 43fc896 - document the model (commit by @mdaubie)
• 47a4b7e - document the SUB_FILE_FORMATS and the PatternHolder (commit by @mdaubie)
• e9726d6 - add Maven Central badge in README (commit by @mdaubie)

🎨 Code Style Changes

• 3c76b81 - reorder and center README header (commit by @mdaubie)