test(positiveflux): add tests for positive flux

also minor corrections in spectral flux and tests for that

re meyda#1074

ci(prerelease): run semantic-release on v6 branch

chore(tests): fix export tests for this PR

fix(deps): bump three from 0.130.1 to 0.131.0

Bumps [three](https://github.com/mrdoob/three.js) from 0.130.1 to 0.131.0.
- [Release notes](https://github.com/mrdoob/three.js/releases)
- [Commits](https://github.com/mrdoob/three.js/commits)

---
updated-dependencies:
- dependency-name: three
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

chore(deps-dev): bump rollup from 2.53.0 to 2.53.1

Bumps [rollup](https://github.com/rollup/rollup) from 2.53.0 to 2.53.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.53.0...v2.53.1)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

feat(new func): expose list of available audio features

We've wanted to provide this for a while, finally knocking it out

fix meyda#312

fix(cli): stop double extracting in certain cases

fix(bundling): support importing commonjs packages

test(export tests): run web export tests with jsdom for window access

fix(package exports): revert prettier rewrite

The prettier rewrite in meyda#823 decided to export an es6 module rather than our default. I didn't
expect prettier to change behaviour, and I didn't catch it. This means that meyda@5.1.4 and
meyda@5.1.5 are bad, and will need to be deprecated. This commit introduces a test that will catch
this issue in the future.