Add Snowflake Identifier

[puzzledpolymath]

Thinking ahead when needing to support Snowflake's, in preparation for https://github.com/cycle/entity-behavior-identifier see 🎟️ cycle/entity-behavior-uuid#13

🔍 What was changed

Added annotations and column mapping for each driver.

📝 Checklist

• How was this tested:
  • Unit tests added

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.42%. Comparing base (876fbc2) to head (84347ae).
Report is 1 commits behind head on 2.x.

Additional details and impacted files

@@            Coverage Diff            @@
##                2.x     #235   +/-   ##
=========================================
  Coverage     95.42%   95.42%           
  Complexity     1896     1896           
=========================================
  Files           131      131           
  Lines          5285     5285           
=========================================
  Hits           5043     5043           
  Misses          242      242           

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[puzzledpolymath]

@roxblnfk Once merged and released, I'll be able to submit a PR to cycle/entity-behavior-identifier supporting Snowflake's

[puzzledpolymath]

@roxblnfk Thanks. When you get a moment would you mind taking a look at cycle/entity-behavior#40 which is the last PR blocking cycle/entity-behavior-identifier#5