Checklist and coordination for v3.8.0 minor release

[jywarren]

This template guides us through the steps of creating a new release, based on conversation and testing in #1692.

Discuss with @publiclab/is-maintainers if anything is ambiguous!

Also see:

• Ideas for next release #2038

• open an issue using the "release" template with this checklist with title Checklist and coordination for v0.0.0 major/minor/patch release (see semantic versioning)
• create a release project from this template. You can copy a project from its menu.
• compile release notes below from corresponding release project.
• open a pull request with updated version numbers
  • update version number in package.json (ex Bump to v3.6.0 for new npm release #1695)
  • update version number in examples/sw.js (ex Bump lockfile and sw.js versions for v3.6.0 #1734)
  • run npm install to update package-lock.json (from recent node version - 16 at time of writing, in GitPod should work)
  • check in package-lock.json
• finalize and merge to main branch (freeze merges to main branch until next step)

Now, move to stable branch:

• force push from main to stable
• then in stable branch, compile /dist/ files with grunt build
• add /dist/ files with git add -f /dist/* and commit them to stable branch
• publish stable branch to npm with npm publish (logging in first as necessary)

Draft a release:

• create a release on GitHub and use features description + release notes from below
• tag version number branch (i.e. v0.0.0) based on stable or choose stable
• publish to live Github pages demo (with bash script from /scripts/update-demo) (from within GitPod works well)
• move anything necessary to next release project, i.e. https://github.com/publiclab/image-sequencer/projects/[insert project number]
• close this issue!

Noting we're now in this process in #1751 for v3.7.0.

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Release notes

Compile and edit release notes below, to be copied into the release description.

Added

• Add clearAllSteps method to sequencer object #1615 (needs test)
• Add arbitrary crop module #1607

Fixed

(almost ready):

• Fix generateOutput called multiple times #1564 (high priority)
• Fix error in replaceImage function #1625 (high priority, needs test)
• Fixes error on | character in CLI #1634

Changed