chore(deps): update dependency serilog.sinks.async to 2.1.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Serilog.Sinks.Async (source)	2.0.0 -> 2.1.0

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Release Notes

serilog/serilog-sinks-async (Serilog.Sinks.Async)

v2.1.0

• #​98 - support ILoggingFailureListener and fallback sinks (@​nblumhardt)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.29%. Comparing base (5c940c0) to head (cd33c6d).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #485      +/-   ##
==========================================
- Coverage   78.86%   78.29%   -0.57%     
==========================================
  Files         114      118       +4     
  Lines       10578    10886     +308     
  Branches     1608     1655      +47     
==========================================
+ Hits         8342     8523     +181     
- Misses       1600     1701     +101     
- Partials      636      662      +26     

see 7 files with indirect coverage changes