chore(deps): update dependency standard-version to v8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
standard-version	devDependencies	major	^7.1.0 -> ^8.0.0

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Release Notes

conventional-changelog/standard-version

v8.0.0

Compare Source

⚠ BREAKING CHANGES

• composer.json and composer.lock will no longer be read from or bumped by default. If you need to obtain a version or write a version to these files, please use bumpFiles and/or packageFiles options accordingly.

Bug Fixes

• composer.json and composer.lock have been removed from default package and bump files. (c934f3a), closes #​495 #​394
• deps: update dependency conventional-changelog to v3.1.18 (#​510) (e6aeb77)
• deps: update dependency yargs to v15.1.0 (#​518) (8f36f9e)
• deps: update dependency yargs to v15.3.1 (#​559) (d98cd46)

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