improvements on Capabilities data

[marinofaggiana]

• Capabilities have grown enormously and the SwiftyJSON proves terribly slow.
• remove the SwiftyJSON and use the swift Codable JSONDecoder

[mpivchev]

Nice! I guess we still need SwiftyJSON for other parts?

[marinofaggiana]

Nice! I guess we still need SwiftyJSON for other parts?

yes yes

[codecov]

Codecov Report

Patch coverage: 75.00% and project coverage change: -0.20 ⚠️

Comparison is base (363772a) 9.25% compared to head (2f67dbc) 9.06%.

❗ Current head 2f67dbc differs from pull request most recent head 70f691d. Consider uploading reports for the commit 70f691d to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           develop   #2539      +/-   ##
==========================================
- Coverage     9.25%   9.06%   -0.20%     
==========================================
  Files          185     185              
  Lines        26129   26272     +143     
  Branches      9775    9802      +27     
==========================================
- Hits          2419    2381      -38     
- Misses       23502   23689     +187     
+ Partials       208     202       -6     

Impacted Files	Coverage Δ
iOSClient/Data/NCManageDatabase+Capabilities.swift	68.69% <75.00%> (+54.60%)	⬆️

... and 12 files with indirect coverage changes

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