fix(deps): update dependency @commercetools/sdk-middleware-auth to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@commercetools/sdk-middleware-auth (source)	^7.0.0 -> ^8.0.0

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Release Notes

commercetools/nodejs (@​commercetools/sdk-middleware-auth)

v8.0.0

Compare Source

Major Changes

• #​1930 5a56792 Thanks @​tdeekens! - # Requires Node.js v18 or later

  This releases migrates packages to require Node.js v18 or later. Ideally you should be already using Node.js v20 or later. According to Node.js Releases Node.js v18 will be in maintenance and reach End of Life by the end of April.

  Other than requiring Node.js v18 packages with this releases do not contain any internal breaking changes.

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Latest commit: 649ab9c

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.73%. Comparing base (1c731e1) to head (9117afb).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #966   +/-   ##
=======================================
  Coverage   96.73%   96.73%           
=======================================
  Files         112      112           
  Lines        2145     2145           
  Branches      633      631    -2     
=======================================
  Hits         2075     2075           
- Misses         63       65    +2     
+ Partials        7        5    -2     

Flag	Coverage Δ
-coverage	96.73% <ø> (ø)

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