Workplace integrations

[flobauer]

Please review my changes for the workplace integration. It is hard to test workplace endpoints because they are publicly not available, i added the features based on the installation I have available.

[codecov]

Codecov Report

Merging #54 into master will increase coverage by 0.02%.
The diff coverage is 92.3%.

@@             Coverage Diff              @@
##             master      #54      +/-   ##
============================================
+ Coverage     71.82%   71.85%   +0.02%     
- Complexity      339      346       +7     
============================================
  Files            32       32              
  Lines           859      867       +8     
============================================
+ Hits            617      623       +6     
- Misses          242      244       +2

Impacted Files	Coverage Δ	Complexity Δ
src/Extensions/User.php	95.65% <100%> (-4.35%)	13 <0> (+6)
src/FacebookDriver.php	82.53% <80%> (-0.19%)	63 <0> (+1)

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[mpociot]

Thank you!