Fix puppeteer snapshot tests
A few of the puppeteer snapshot tests are broken and currently being skipped.
https://github.com/cybersemics/em/blob/f68689f6471af07ba87db97cdd9b68bf42cdc910/src/e2e/puppeteer/tests/snapshot.ts
The original file has moved; as far as I can tell these are the snapshot tests that are currently being skipped:
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/ColorPicker.ts#L18
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/drag-and-drop.ts#L241
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/render-thoughts.ts#L71
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/render-thoughts.ts#L100
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/render-thoughts.ts#L115
https://github.com/cybersemics/em/blob/792586ed9eaea70344cc24555f4d37bd60d6aa28/src/e2e/puppeteer/tests/render-thoughts.ts#L141