Initialize optional query parameters with null

[agologan]

Pretty self explanatory, helps with calling APIs with many parameters as you don't have to specify all params.

Considered also initialising with default value but that's more like the value the server assigns when a param is missing so I don't think it's wise to pre-initialize it in the client.

[codecov[bot]]

Codecov Report

Merging #145 (6454f3b) into master (54394ee) will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #145   +/-   ##
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  Coverage     71.95%   71.95%           
  Complexity      139      139           
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  Files            11       11           
  Lines           574      574           
  Branches         75       75           
=========================================
  Hits            413      413           
  Misses          118      118           
  Partials         43       43           

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[agologan]

[...] can I ask you to add a test [...] for a call to getSymbolsInParameterName() with no parameters?

done.

[cortinico]

@cortinico will you follow-up with merging (and eventually releasing) this?

Let's merge this. For the releasing part, I'd love to have this into 2.x I'll have some time during the XMas eve to review/develop all the remaining features for 2.x