Bump flat and release-it

[dependabot]

Removes flat. It's no longer used after updating ancestor dependency release-it. These dependencies need to be updated together.

Removes flat

Updates release-it from 12.3.5 to 15.6.0

Release notes

Sourced from release-it's releases.

Release 15.6.0

• Fix specs for #966 (39a318b)
• Move space (quickfix) (cfae247)
• fix: use spec formdata (#958) (c21e6b6)
• Fix npm.isCollaborator() on npm v9 (#966) (3bd405a)
• feat(git): added option to use --exclude option on git describe (#963) (2b484bf)

Release 15.5.1

• Update dependencies (aa89cbd)
• Prompt for npm OTP in --only-version (fixes #948) (ff626d1)
• Remove unused export/function (331b0de)
• Add knip + config (ee99f63)

Release 15.5.0

• Update dependencies (5d035be)
• Add npm.versionArgs option (5efc57f)

Release 15.4.3

• Update dependencies (67da5d9)
• Update got to 12.5.1 (#943) (a9c8c34)

Release 15.4.2

• Update dependencies (97095d5)
• Defer dry run bail out in asset globbing (to include the warning in dry runs) (bf6ccc8)
• Housekeeping for Actions (feff2eb)

Release 15.4.1

• Handle file paths and dots in git urls (055a4ff)
• Update dependencies (including git-url-parse) (1851650)

Release 15.4.0

• Add npm.name to config.context and extend context for tagName (closes #933) (627763f)

Release 15.3.0

• Add new features to docs (e2101ed)
• Add tests for branchName in tag name (a6f6eff)
• Update dependencies (ae9ccb9)
• add branchName for template (#897) (9aa9a5d)
• add new --changelog option (#912) (5798a7a)

Release 15.2.0

• Update dependencies (b78eb1e)
• Add package.json to exports (acc66f7)
• Fixes loading scoped plugins to ensure name is preserved (#926) (145fc71)
• Add workaround for Windows by removing drive letter from git url (#924) (ce3a726)
• Enable manual triggers and disable tag triggers in test pipeline (b830876)
• Fix plugin links (b7cd505)

Release 15.1.4

• Migrate to git-url-parse v12 (41aad00)

... (truncated)

Changelog

Sourced from release-it's changelog.

Changelog

This document lists breaking changes for each major release.

See the GitHub Releases page for detailed changelogs: https://github.com/release-it/release-it/releases

v15 (2022-04-30)

• Removed support for Node.js v10 and v12.
• Removed support for GitLab v12.4 and lower.
• Removed anonymous metrics (and the option to disable it).
• Programmatic usage and plugins only through ES Module syntax (import)

Use release-it v14 in legacy environments.

v14 (2020-09-03)

• Removed global property from plugins. Use this.config[key] instead.
• Removed deprecated npm.access option. Set this in package.json instead.

v13 (2020-03-07)

• Dropped support for Node v8
• Dropped support for GitLab v11.6 and lower.
• Deprecated scripts are removed (in favor of hooks).
• Removed deprecated --non-interactive (-n) argument. Use --ci instead.
• Removed old %s and [REV_RANGE] syntax in command substitutions. Use ${version} and ${latestTag} instead.

v12 (2019-05-03)

• The --follow-tags argument for git push has been moved to the default configuration. This is only a breaking change if git.pushArgs was not empty (it was empty by default).

v11

• The custom conventional-changelog increment (e.g. "increment": "conventional:angular") with additional script configuration is replaced with a plugin. Please see conventional changelog how to use this plugin.
• The pkgFiles option has been removed. If there's a need to bump other files than what npm version bumps, it should be (part of) a plugin.
• By default, the latest version was derived from the latest Git tag. From v11, if the repo has a package.json then that version is used instead. The use option has been removed. Also see latest version.
• scripts.changelog has been moved to git.changelog

v10

• Dropped support for Node v6

... (truncated)

Commits

• 922827d Release 15.6.0
• 39a318b Fix specs for #966
• cfae247 Move space (quickfix)
• c21e6b6 fix: use spec formdata (#958)
• 3bd405a Fix npm.isCollaborator() on npm v9 (#966)
• 2b484bf feat(git): added option to use --exclude option on git describe (#963)
• 5c02079 Release 15.5.1
• aa89cbd Update dependencies
• ff626d1 Prompt for npm OTP in --only-version (fixes #948)
• 331b0de Remove unused export/function
• Additional commits viewable in compare view

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