chore(deps): update dependency standard-version to v5

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
standard-version	devDependencies	major	^4.2.0 -> ^5.0.0	source

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Release Notes

conventional-changelog/standard-version

v5.0.0

Compare Source

Bug Fixes

• bin now enforces Node.js > 4 (#​274) (e1b5780)
• no --tag prerelease for private module (#​296) (27e2ab4), closes #​294
• show correct pre-release tag in help output (#​259) (d90154a)

chore

• update testing matrix (1d46627)

Features

• adds support for bumping for composer versions (#​262) (fee872f)
• cli application accept path/preset option (#​279) (69c62cf)
• fallback to tags if no meta-information file found (#​275) (844cde6)
• preserve formatting when writing to package.json (#​282) (96216da)

BREAKING CHANGES

• if no package.json, bower.json, etc., is found, we now fallback to git tags
• removed Node 4/5 from testing matrix

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