Update Rust crate built to 0.7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
built	dev-dependencies	minor	0.6 -> 0.7

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Release Notes

lukaslueg/built (built)

v0.7.1

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Changed

• Fixed no_std builds

v0.7.0

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Changed

• The Options-type has been removed in favor of controlling built's behavior by means of feature-flags.
• cargo-lock is now an optional dependency
• Bump git2 to 0.18

v0.6.1

Compare Source

Changed

• Bump git2 to 0.17
• Bump cargo-lock to 9.0

Added

• FEATURES_LOWERCASE and FEATURES_LOWERCASE_STR

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