Add Customer DataModel and SaveCustomerCommand

[nei]

• DataModel for m2 Customer, CustomerAddress, RegionData
• Command for SaveCustomer

[codecov]

Codecov Report

Merging #15 into master will increase coverage by 0.84%.
The diff coverage is 94.44%.

@@            Coverage Diff             @@
##             master    #15      +/-   ##
==========================================
+ Coverage     91.16%    92%   +0.84%     
- Complexity     1978   2277     +299     
==========================================
  Files            71     77       +6     
  Lines          4537   5165     +628     
==========================================
+ Hits           4136   4752     +616     
- Misses          401    413      +12

Impacted Files	Coverage Δ	Complexity Δ
src/Transform/CreateSaveCustomerCommands.php	0% <0%> (ø)	5 <5> (?)
src/RegionData.php	100% <100%> (ø)	16 <16> (?)
src/CustomerData.php	100% <100%> (ø)	65 <65> (?)
src/Command/SaveCustomerCommand.php	100% <100%> (ø)	7 <7> (?)
src/Order/AddressData.php	100% <100%> (ø)	112 <10> (ø)	⬇️
src/CustomAttributeSet.php	100% <100%> (ø)	8 <2> (+2)	⬆️
src/AddressSet.php	71.42% <71.42%> (ø)	7 <7> (?)
src/CustomerAddress.php	95.3% <95.3%> (ø)	91 <91> (?)
src/Order/PaymentData.php	100% <0%> (ø)	329% <0%> (+105%)	⬆️
... and 9 more

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[alexanderwanyoike]

Nice one. Seems cool to me a bit confusing how magento treat ids though.

[alexanderwanyoike]

Looks good.