Bump gatsby from 2.19.49 to 2.20.8

Bumps gatsby from 2.19.49 to 2.20.8.

Commits

a83fbf1 chore(release): Publish
91e7bfb fix(gatsby-transformer-sharp): Add checkSupportedExtensions… (#22565)
2d6f701 Update sites.yml (#22589)
4753ef3 chore (doc):Create a files for "Building a generic plugin" and link "Files ga...
dec98be Update gitlab-ci.yml template (#22572)
6d1356c fix(gatsby): Mark plugin parameter as optional for actions (#22546)
e733c36 chore: fix livestream social sharing (#22579)
f9133d2 chore(release): Publish
0f02ea7 feat(gatsby): enable granular chunks (#22253)
bfbb094 docs: gatsby-magic page - Reword redux section for actions emphasis (#21688)
Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

Dependabot will not automatically merge this PR because it includes a minor update to a production dependency.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme Additionally, you can set the following in the `.dependabot/config.yml` file in this repo: - Update frequency - Automerge options (never/patch/minor, and dev/runtime dependencies) - Out-of-range updates (receive only lockfile updates, if desired) - Security updates (receive only security updates, if desired)

nodeschool / vancouver

Bump gatsby from 2.19.49 to 2.20.8 #353