Update Gatsby version to latest to solve issue 9145

[GuyKh]

Update Gatsby version to latest to solve issue #9145

[pieh]

First of all - thanks for proactive approach here. Just minor change needed to more precisely define version range

[pieh]

It should be 2.0.20 (that's where this API was added)

[GuyKh]

@pieh - ready :)

[pieh]

Thanks @GuyKh!

[gatsbot]

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