House keeping

[nikku]

• Update to npm@8
• Incorportate camunda-bpmn-js-behaviors@0.2.0
• Dependency bumps

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We should get rid of the raw-loader at some point, too. However the following is a common pattern in the properties-panel test suite and not supported by stock Webpack@5 facilities:

const diagram = require('some-path-to-diagram.bpmn').default

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Closes #728

[pinussilvestrus]

Great stuff! Only one comment, feel free to merge afterward 👍

Let's also follow up with camunda/camunda-bpmn-js#158 once merged and released.