Increment version to 2.12.0-SNAPSHOT

[ryanbogan]

Description

Increments version to 2.12.0-SNAPSHOT

Note: The Processor.Parameters class added a new parameter for the constructor (IndicesService), so adding null to the test is necessary for compile to work.

Check List

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (979e350) 88.92% compared to head (1cbf549) 89.03%.

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x     #595      +/-   ##
============================================
+ Coverage     88.92%   89.03%   +0.10%     
- Complexity      765      767       +2     
============================================
  Files            93       93              
  Lines          2746     2746              
  Branches        223      223              
============================================
+ Hits           2442     2445       +3     
+ Misses          222      221       -1     
+ Partials         82       80       -2     

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