Add and fix filed Symbol struct futures exchangeInfoService and add SetApiEndpoint

[mmavka]

add:

• LiquidationFee string `json:"liquidationFee"`
• MarketTakeBound string `json:"marketTakeBound"`

fix:

• OrderType []OrderType `json:"orderType"`

[codecov[bot]]

Codecov Report

Merging #437 (d86d0ee) into master (c028fe5) will decrease coverage by 0.08%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #437      +/-   ##
==========================================
- Coverage   69.91%   69.82%   -0.09%     
==========================================
  Files          76       76              
  Lines        7167     7176       +9     
==========================================
  Hits         5011     5011              
- Misses       1624     1633       +9     
  Partials      532      532              

Impacted Files	Coverage Δ
v2/client.go	81.00% <0.00%> (-0.73%)	:arrow_down:
v2/delivery/client.go	81.45% <0.00%> (-1.66%)	:arrow_down:
v2/futures/client.go	75.11% <0.00%> (-1.10%)	:arrow_down:
v2/futures/exchange_info_service.go	75.55% <ø> (ø)

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