Changed DataQuery API batch size from 10 to 20

[Magnus167]

Changed the DataQuery API batch size from 10 to 20 requests; as per @lsimonsen

[codecov-commenter]

Codecov Report

Base: 60.62% // Head: 60.62% // No change to project coverage 👍

Coverage data is based on head (908dc04) compared to base (9e43f86).
Patch coverage: 0.00% of modified lines in pull request are covered.

❗ Current head 908dc04 differs from pull request most recent head 67171ff. Consider uploading reports for the commit 67171ff to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #578   +/-   ##
========================================
  Coverage    60.62%   60.62%           
========================================
  Files           26       26           
  Lines         2809     2809           
========================================
  Hits          1703     1703           
  Misses        1106     1106           

Impacted Files	Coverage Δ
macrosynergy/dataquery/api.py	41.44% <0.00%> (ø)

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