chore(deps): update dependency gapic-tools to ^0.4.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
gapic-tools (source)	^0.3.0 -> ^0.4.0

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Release Notes

googleapis/gax-nodejs (gapic-tools)

v0.4.0: gapic-tools: v0.4.0

Compare Source

Features

• allow passing --keep-case and --force-number to compileProtos (#​1561) (004d112)

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