build: bump rxjs from 5.5.6 to 5.5.7

[dependabot-preview]

Bumps rxjs from 5.5.6 to 5.5.7.

Changelog

Sourced from rxjs's changelog.

6.0.0-beta.0 (2018-03-16)

Bug Fixes

• AjaxObservable: 1xx,2xx,3xx requests shouldn't error, only 4xx,5xx (#3438) (2128932)
• compat: adjustments to get rxjs-compat to build correctly (dea6964)
• config: expose configuration via rxjs exports (#3441) (4287424)
• config: make sure that Promise config is undefined initially (#3440) (469afe8)
• ESM: Add [operators|ajax|websocket|testing]/package.json for ESM support, fixes #3227 (#3356) (725dcb4)
• forkJoin: fix forkJoin typings for forkJoin(Observable[]) (#3436) (17c7f8f)
• fromEvent: Defines toString to fix Closure compilations (#3417) (1558b43)
• fromEvent: pass options in unsubscribe (f1872b0), closes #3349
• publishReplay: type inference improved (#3437) (dd7c9f1), closes #3260
• rxjs: add exports for symbols/interfaces that were missing (#3380) (1622ee0)
• rxjs: make sure esm imports from index.js by default, not Rx.js (#3316) (c2b00f4), closes #3315
• rxjs: once again exports custom error types (#3371) (4465a9f)
• rxjs: remove types.ts importing from itself. (#3383) (8fd50ad)
• spec: get tests running using compatibility package (916e968)
• correct internal module paths to be systemjs compatible (#3412) (35abc9d)
• Symbol.iterator: correctly handle case where Symbol constructor itself is not defined (#3394) (6725be1)
• typings: fixed some cases where multicast and publish would not return a ConnectableObservable (#3320) (ddffecc)
• reexport Symbol.observable typings patch (4c4d7b0)
• remove the root operators.ts because it overshadows operators/package.json (184b6d4)

Code Refactoring

• Observable.if: remove ts hacks from Observable (f46f261)
• Rx.ts: move Rx.ts to internal (#3400) (7ad2119)

Features

• ajax: default to opting into CORS (#3442) (aa3bf57), closes #3273
• bindCallback: remove result selector (2535641)
• bindNodeCallback: remove resultSelector (26e6e5c)
• compat: add compatability package definition (40aca82)
• compat: add concat operator to compatibility layer (6e84e78)
• compat: add legacy reexport compat layer for 'rxjs/Observable' and other top-level symbols (70e562b)
• compat: add Rx.ts to rxjs-compat (df25de1)
• compat: combatability mode for combineLatest (fd86df5)
• compat: compatibility mode for merge operator (ffce980)
• compat: compatibility mode for zip operator (9f131d0)
• compat: make Rx.ts for compatability layer work as the default for rxjs-compat (d43a4c2)
• compat: set up correct imports & get build working for rxjs-comapt (1a0dc97)
• deprecated-error-handling-warning: add console warning when code sets the flag to bad mode (49be56a)
• error-handling: add deprecated sync error handling behind a flag (583cd1d)
• exhaustMap: simplify interface (42589d0)
  ... (truncated)

Commits

• 4cbd91c chore(publish): 5.5.7
• 2b9afb7 5.5.7
• d287218 fix(fromEvent): pass options in unsubscribe (#3413)
• e2cd3a2 fix(toArray): do not mutate array per subscription (#3335)
• 7d900a1 chore(BUILD): fix broken build (#3285) (#3369)
• c009ac6 Merge pull request #3322 from alexeagle/bazel
• 935e805 chore(bazel): allow downstream projects to omit //:node_modules
• c7e33e4 chore(npm): remove package-lock.json
• 3e8984d chore(script): update publish script to commit at the proper point
• See full diff in compare view

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[dependabot-preview]

Superseded by #108.