Bump rxjs from 6.4.0 to 6.6.6

[dependabot-preview[bot]]

Bumps rxjs from 6.4.0 to 6.6.6.

Changelog

Sourced from rxjs's changelog.

6.6.6 (2021-02-25)

Bug Fixes

• shareReplay: handle possible memory leaks (#5932) (6f7d88b)

6.6.5 accidentally published without changes. :D

6.6.4 (2021-02-24)

Bug Fixes

• ReplaySubject: don't buffer next if stopped (#5696) (47d9e33)
• Ensure unsubscriptions/teardowns on internal subscribers are idempotent (#5465) (6d6a882), closes #5464

6.6.3 (2020-09-06)

Bug Fixes

• ReplaySubject: don't buffer next if stopped (#5696) (47d9e33)
• Ensure unsubscriptions/teardowns on internal subscribers are idempotent (#5465) (6d6a882), closes #5464

6.6.2 (2020-07-31)

Bug Fixes

• perf: Reduce memory pressure by no longer retaining outer values across the majority of operators. (#5613) (10cc8a6)

6.6.1 (2020-07-31)

Bug Fixes

• perf: Ensure unsubscriptions/teardowns on internal subscribers are idempotent (#5465) (6d6a882), closes #5464

6.6.0 (2020-07-02)

Bug Fixes

... (truncated)

Commits

• 02219cc chore(publish): 6.6.6
• 2b003b5 chore(publish): 6.6.5
• c8ea5a1 chore(merge): Merge missed commits from master into publishing branch
• f2ffada chore(publish): 6.6.4
• 6f7d88b fix(shareReplay): handle possible memory leaks (#5932)
• 76c84d7 Update creating operators link (#6028)
• 1e1e022 docs(versioning): add versioning to docs website (#5793)
• e968d93 docs(alumn): add Jay Phelps as core team alumn (#5262)
• 5c68e20 chore(publish): 6.6.3
• 47d9e33 fix(ReplaySubject): don't buffer next if stopped (#5696)
• Additional commits viewable in compare view

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Superseded by #136.