Update to Lightstreamer API to bring in Market price subscription and associated test cases

[Brookie144]

Updates to bring in the market price interfaces, test cases and updates to the LightstreamerAPI.

Issue #612

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (f8a073c) to head (293613a).
Report is 58 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##              main      #613    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files           11        11            
  Lines          393       511   +118     
  Branches        21        25     +4     
==========================================
+ Hits           393       511   +118     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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Files	Coverage Δ
src/lightstreamer/LightstreamerAPI.ts	100.00% <100.00%> (ø)
src/lightstreamer/interfaces.ts	100.00% <100.00%> (ø)
src/market/MarketAPI.ts	100.00% <ø> (ø)

... and 3 files with indirect coverage changes

[bennycode]

Great addition! I will release it with ig-trading-api@0.13.8.