web: Update watch-detector (#2162)
web: Update watch-detector (#2162)

This silences a warning related to watchman changing
versioning schemes as documented here:
https://github.com/ember-cli/ember-cli/pull/9619

Invalid watchman found, version: [2021.08.02.00] did not satisfy [>= 3.0.0].
Visit https://ember-cli.com/user-guide/#watchman for more info.
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