Bug#934496: node-regexpu-core: unbuildable in testing due to missing B-D

[Esa Peuha]

Source: node-regexpu-core
Version: 4.5.4+ds+1
Severity: serious

Binary package node-unicode-12.0.0 is no longer built from source and
was removed from testing. As a result node-regexpu-core is unbuildable
in testing. Please build-depend on node-unicode-12.1.0 instead.