chore: update deps

fix(pkg): support electron 7

chore: update deps

chore: update deps

test: add simple DMG test

fix: include SnapStoreOptions into schema

fix(dmg): cannot build DMG on macOS 10.15

Close electron-userland#3990

feat(linux): add fileAssociation support for fpm target

fix: requireProviderClass should be aware about snapStore

feat(snap): publishing to Snapcraft

Close electron-userland#3187