Prepare for stable release

[jdel]

• Update dependencies
• Remove sirupsen/logrus
• Add I18n display name and description fields to syno.Package
• Replace Travis with GH Actions
• Implement Take into account new os_min_ver field in INFO file gosspks#11
• Ensure compatibility with DSM7 DSM7 support gosspks#16

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[zhangbo8418]

When will the stable version be released?

[jdel]

@zhangbo8418 As soon as I can wrap up DSM7 compatibility, which should move forward now I got my hands on a DSM7 compatible device.

[zhangbo8418]

@zhangbo8418 As soon as I can wrap up DSM7 compatibility, which should move forward now I got my hands on a DSM7 compatible device.

[zhangbo8418]

@zhangbo8418 As soon as I can wrap up DSM7 compatibility, which should move forward now I got my hands on a DSM7 compatible device.

In addition, the program is not robust enough and may crash easily.