added user universal transfer method to Binance Spot

[amaioli]

I've implemented the user universal transfer method according to https://binance-docs.github.io/apidocs/spot/en/#user-universal-transfer-user_data

[codecov]

Codecov Report

Merging #313 (8c4995c) into master (1c85553) will increase coverage by 0.09%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master     #313      +/-   ##
==========================================
+ Coverage   74.42%   74.51%   +0.09%     
==========================================
  Files          57       58       +1     
  Lines        5446     5482      +36     
==========================================
+ Hits         4053     4085      +32     
- Misses       1022     1024       +2     
- Partials      371      373       +2     

Impacted Files	Coverage Δ
v2/user_universal_transfer.go	88.23% <88.23%> (ø)
v2/client.go	85.16% <100.00%> (+0.12%)	⬆️

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[brianmori]

hi @adshao ,

could you merge this PR? 👍

[amaioli]

Hi, can you please merge it?

[adshao]

Hi, can you please merge it?

Sorry for the delay reply, thanks for this PR.