Bump rxjs from 5.5.11 to 6.6.2

[dependabot-preview]

Bumps rxjs from 5.5.11 to 6.6.2.

Changelog

Sourced from rxjs's changelog.

6.6.2 (2020-07-31)

Bug Fixes

• perf: Ensure unsubscriptions/teardowns on internal subscribers are idempotent (#5465) (6d6a882), closes #5464
• perf: Reduce memory pressure by no longer retaining outer values across the majority of operators. (#5613) (10cc8a6)

6.6.0 (2020-07-02)

Bug Fixes

• asapScheduler: resolved memory leak (#5183) (4312af5), closes #5016
• fetch: don't leak event listeners added to passed-in signals (#5305) (06bf3a3)
• fromFetch: passing already aborted signal to init aborts fetch (c2657a8)
• pipe: Special handling for 0-arg case. (#4936) (2e9d867)
• pluck: operator breaks with null/undefined inputs. (#5524) (3bb2f7f)
• shareReplay: no longer misses synchronous values from source (d2f6ac7)
• interop: chain subscriptions from interop observables for 6.x (#5178) (cbc7721)
• shareReplay: clear subscription on shareReplay completion (#5044) (9f87505), closes #5034
• fromFetch: don't reassign closed-over parameter in fromFetch (#5234) (0377710), closes #5233 #5233
• iterables: errors thrown from iterables now properly propagated (#5444) (2bce0e3)
• fromFetch: missing package.json in rxjs/fetch (#5001) (06fb735)

Features

• fromFetch: add selector (cherry pick #5306 for v6) (#5442) (3d6e4c5)

6.5.5 (2020-04-03)

Bug Fixes

• fetch: don't leak event listeners added to passed-in signals (#5305) (06bf3a3)
• pipe: Special handling for 0-arg case. (#4936) (2e9d867)
• don't reassign closed-over parameter in fromFetch (#5234) (0377710), closes #5233 #5233
• asapScheduler: resolved memory leak (#5183) (4312af5), closes #5016
• chain subscriptions from interop observables for 6.x (#5178) (cbc7721)
• clear subscription on shareReplay completion (#5044) (9f87505), closes #5034
• fromFetch: passing already aborted signal to init aborts fetch (c2657a8)
• missing package.json in rxjs/fetch (#5001) (06fb735)

Commits

• e2acd9b chore(publish): 6.6.2
• cddc925 Merge branch '6.x' of github.com:ReactiveX/rxjs into 6.x
• ca6a3a1 chore(publish): 6.6.1
• 10cc8a6 refactor: Improve memory pressure (#5613)
• 075af28 docs: fix import in timeoutWith example
• 6d6a882 fix: Ensure unsubscriptions/teardowns on internal subscribers are idempotent ...
• 7437993 chore(publish): 6.6.0
• 166a4cf refactor: Fix typings issue
• d2f6ac7 fix(shareReplay): no longer misses synchronous values from source
• 3bb2f7f fix(pluck): operator breaks with null/undefined inputs. (#5524)
• Additional commits viewable in compare view

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