chore(deps): pin dependency babel-preset-gatsby to v2.4.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
babel-preset-gatsby (source)	devDependencies	pin	^2.4.0 -> 2.4.0

Add the preset :preserveSemverRanges to your config if you don't want to pin your dependencies.

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