- Update `lodash` to the latest version `4.17.21`.
- Disable some attributes for rich text.
- Use hashed/deterministic moduleIDs in webpack config.
Props ellatrix, peterwilsoncc, get_dave, mcsf, talldanwp, youknowriad, desrosj, nerrad, gziolo.
Merges [50940-50941,50984-50985,51426] to the 5.2 branch.
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