Bump yargs-parser and electron-packager#20

dependabot[bot] wants to merge 1 commit intomastermarkstuart/electron-gcal:masterfrom

dependabot/npm_and_yarn/yargs-parser-and-electron-packager-18.1.3markstuart/electron-gcal:dependabot/npm_and_yarn/yargs-parser-and-electron-packager-18.1.3Copy head branch name to clipboard