chore: update rxjs to version 6.6.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
rxjs	~6.5.2 -> ~6.6.0

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Release Notes

reactivex/rxjs

v6.6.7

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v6.6.6

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v6.6.4

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v6.6.3

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v6.6.2

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v6.6.1

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v6.6.0

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v6.5.5

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v6.5.4

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Configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box.

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻️ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you check the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: package-lock.json

npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated
npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated
npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142
npm WARN deprecated mkdirp-promise@5.0.1: This package is broken and no longer maintained. 'mkdirp' itself supports promises now, please switch to that.
lerna notice cli v3.19.0
lerna notice filter including ["@speedy/*"]
lerna info filter [ '@speedy/*' ]
lerna info Bootstrapping 2 packages
lerna WARN EHOIST_ROOT_VERSION The repository root depends on tslib@^1.10.0, which differs from the more common tslib@^1.9.0.
lerna WARN EHOIST_PKG_VERSION "@speedy/package-1" package depends on tslib@^1.9.0, which differs from the hoisted tslib@^1.10.0.
lerna WARN EHOIST_PKG_VERSION "@speedy/package-2" package depends on tslib@^1.9.0, which differs from the hoisted tslib@^1.10.0.
lerna info Installing external dependencies
lerna info hoist Installing hoisted dependencies into root
lerna info hoist Finished bootstrapping root