Align SearchResult and scroll with other SDKs

[dbengsch]

Breaking changes:

• Align SearchResult constructor signature with other SDKs
• Rename next into fetchNext
• Move the scroll option into the scroll action signature

Other changes:

• Add getters on SearchResult

Boyscout:

• Renaming of some variables
  • dataCollection => collection
  • KuzzleSubscribeResult => SubscribeResult
  • KuzzleSearchResult => SearchResult
  • KuzzleSecurityDocument => SecurityDocument

documentation: kuzzleio/documentation#139
fix: https://github.com/kuzzleio/sdk/issues/13

[codecov-io]

Codecov Report

Merging #190 into 4.x will decrease coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              4.x     #190      +/-   ##
==========================================
- Coverage   99.39%   99.33%   -0.06%     
==========================================
  Files          16       16              
  Lines        1646     1660      +14     
  Branches      439      439              
==========================================
+ Hits         1636     1649      +13     
- Misses         10       11       +1

Impacted Files	Coverage Δ
src/Room.js	100% <100%> (ø)	✅
src/security/Role.js	100% <100%> (ø)	✅
src/security/SecurityDocument.js	100% <100%> (ø)	✅
src/Collection.js	96.94% <100%> (-0.45%)	❌
src/security/Profile.js	100% <100%> (ø)	✅
src/SearchResult.js	100% <100%> (ø)	✅
src/SubscribeResult.js	100% <100%> (ø)	✅
src/Document.js	100% <100%> (ø)	✅

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