v4.0.0-beta.20

• chore(i18n): update translations (#593) (f51ea81), closes #593
• chore(release): 4.0.0-beta.20 (516f772)
• feat(annotator): Add initial mode option in constructor (#591) (98dedd7), closes #591
• feat(discoverability): put region layer under textLayer (#579) (1a2fc85), closes #579
• feat(discoverability): revert FF related styles in DocumentAnnotator (#595) (133430a), closes #595
• feat(eventing): Emit new creator_status_change event (#588) (b4e8aec), closes #588
• feat(highlights): Better rect smoothing (#596) (2535357), closes #596
• feat(mode): Remove toggle logic (#590) (63f1cfb), closes #590
• test(cypress): Bump Preview SDK version (#594) (4be639a), closes #594
• test(replyform): Fix ReplyForm event handler unit tests (#592) (e31a2fa), closes #592
• fix(highlights): Change pointer-events for highlight svg to visible (#589) (c782d49), closes #589