Fatal node incompatibilities for LTS versions

[duncdrum]

Under node 12 (as per documentation the min version)
we have an upstream incompatibility that causes the build to error:

error electron-builder@22.11.7: The engine "node" is incompatible with this module. Expected version ">=14.0.0". Got "12.22.1"

under node 14

error dugite-extra@0.1.14: The engine "node" is incompatible with this module. Expected version ">=10.11.0 <13". Got "14.15.5"

so compiling is currently broken.