Bug#910148: java-common: update to OpenJDK 11

[Emilio Pozuelo Monfort]

Source: java-common
Version: 0.68
Severity: normal

Hi,

Since we want to remove OpenJDK 10 as it's not LTS, we should update
java-common to default to OpenJDK 11 for the buster release.

Cheers,
Emilio