fix(deps): Add support for RxJS 6

[brandonroberts]

Also cleans up linter errors with latest version of xo

BREAKING CHANGE:

Minimum dependency on RxJS is ^5.6.0-forward-compat.0 || ^6.0.0-rc.1

[codecov-io]

Codecov Report

Merging #89 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #89   +/-   ##
=======================================
  Coverage   96.29%   96.29%           
=======================================
  Files           7        7           
  Lines         189      189           
=======================================
  Hits          182      182           
  Misses          7        7

Impacted Files	Coverage Δ
index.js	100% <ø> (ø)	⬆️
lib/task-wrapper.js	90% <ø> (ø)	⬆️
lib/task.js	100% <100%> (ø)	⬆️

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[SamVerschueren]

Hi @brandonroberts, thanks for your PR! And for all the lint fixes.

Just one question, is there a reason to already make the switch to RxJS instead of waiting until it's stable?

[brandonroberts]

The error is going to bite users who are testing out release candidates. For people who wait until everything is official it will it may only fail if they don't install the compatibility package. I came across the failure due to the upstream lint-staged package I was using with husky when I was upgrading to the latest release candidate. Installing the rxjs-compat package along with the latest RxJS release candidate solves the issue.

[SamVerschueren]

Ah okay! Thanks for your explanation! Makes sense. Can you upgrade the rc version? It's already rc.1 if I'm not mistaken.

[brandonroberts]

Done

[SamVerschueren]

Sweet! Thank you very much for your effort @brandonroberts! Released as 0.14.0.

[SamVerschueren]

@brandonroberts Care to help me out with an issue downstream in any-observable? I guess you know a little more about RxJS 6 and it's changes :).

Issue is described here sindresorhus/any-observable#18. It causes a failure in lint-staged.

[brandonroberts]

Sure. I left a comment on the issue