Add global keyboard shortcut support with operating system

[bingenito]

No description provided.

[codecov]

Codecov Report

Merging #214 into master will increase coverage by 0.2%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #214     +/-   ##
=========================================
+ Coverage   93.24%   93.44%   +0.2%     
=========================================
  Files          15       16      +1     
  Lines        1435     1479     +44     
  Branches      246      249      +3     
=========================================
+ Hits         1338     1382     +44     
  Misses         97       97

Impacted Files	Coverage Δ
packages/desktopjs/src/container.ts	93.84% <ø> (ø)	⬆️
packages/desktopjs-electron/src/electron.ts	96.97% <100%> (+0.16%)	⬆️
packages/desktopjs-openfin/src/openfin.ts	86.76% <100%> (+0.82%)	⬆️
packages/desktopjs/src/shortcut.ts	100% <100%> (ø)
packages/desktopjs/src/desktop.ts	100% <100%> (ø)	⬆️