fix(deps): update module github.com/volatiletech/null/v8 to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
github.com/volatiletech/null/v8	v8.1.2 -> v9.0.0

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Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

volatiletech/null (github.com/volatiletech/null/v8)

v9.0.0

Compare Source

Added

• Add a new .Set that can be introspected to see if things are set.
  (thanks @​razor-1)

Fixed

• Fix []byte to be base64 encoded in json to match how []byte is handled
  (thanks @​razor-1)

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.87%. Comparing base (9089164) to head (e52e7f3).

❗ Current head e52e7f3 differs from pull request most recent head 17f4c91

Please upload reports for the commit 17f4c91 to get more accurate results.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #182      +/-   ##
==========================================
- Coverage   72.72%   71.87%   -0.86%     
==========================================
  Files          38       36       -2     
  Lines        3733     3549     -184     
==========================================
- Hits         2715     2551     -164     
+ Misses        760      745      -15     
+ Partials      258      253       -5     

Flag	Coverage Δ
unittests	71.87% <ø> (-0.86%)	⬇️

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