Bump gatsby-image from 2.4.17 to 2.4.20

[dependabot[bot]]

Bumps gatsby-image from 2.4.17 to 2.4.20.

Changelog

Sourced from gatsby-image's changelog.

2.4.20 (2020-09-28)

Note: Version bump only for package gatsby-image

2.4.19 (2020-09-16)

Bug Fixes

• gatsby-image: Don't assume DOM state is valid at hydration stage (#26097) (cf34304)

2.4.18 (2020-09-15)

Note: Version bump only for package gatsby-image

Commits

• e829ab9 chore(release): Publish
• 5619220 chore(deps): update dependency jest-matchmedia-mock to ^1.1.0 (#27084)
• b7d76d3 chore(deps): update dependency cross-env to v7 (#27054)
• 8168079 chore(release): Publish
• cf34304 fix(gatsby-image): Don't assume DOM state is valid at hydration stage (#26097)
• 23d8966 chore(release): Publish
• 370f200 chore: upgrade babel monorepo (#26897)
• See full diff in compare view

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Dependabot will merge this PR once it's up-to-date and CI passes on it, as requested by @ehowey.

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[ehowey]

@dependabot squash and merge

[dependabot[bot]]

Superseded by #961.