Update dependencies - use candela for lights

[MarcusLongmuir]

This PR updates multiple dependencies, but most importantly updates THREE.js to 0.163.0 and in THREE.js v0.155.0 there was a change to use candela to specify lighting intensities.

The MML spec (XSD) is also updated in this PR to specify that lights are measured in candela.

This required multiplying existing intensity values that are in the e2e tests and rebuilding the e2e test images.

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What kind of changes does your PR introduce? (check at least one)

• [x] Feature: Use candela for light intensity
• [x] Other, please describe: Update dependencies

Does your PR introduce a breaking change? (check one)

• [x] Yes

If yes, please describe its impact and migration path for existing applications:

MML content targeting this version of the spec will need to update m-light intensity values.

Does your PR fulfill the following requirements?

• [x] All tests are passing