Fix build warning 'observer' mutated after capture by sendable closure

On macOS 11 set the outline view style to NSTableViewStylePlain.

This eliminates the padding added to the outline view on Big Sur.

Use KVC to allow compiling without the macOS 11 SDK.
The method -[NSTableView setStyle:] was not available before then.

Fix bug where there's a blank row displayed when the TXT record is em…

…pty.

Fix for #10

Crash when viewing ipfs daemon

Bump version from 1.0.5 to 1.0.6 for release.

Bumped the version from 1.0.4 to 1.0.5 for release.

Bump version from 1.0.3 to 1.0.4

Bump version from 1.0.2 to 1.0.3

Case-insensitive sort of the items in the outline view.

Bump version to 1.0.1