Add Node 15 support

[hongbo-miao]

No description provided.

[hongbo-miao]

Why failed on Node 10 and 12...

[lholmquist]

looks like it is failing when trying to publish the coverage report to coveralls

[helio-frota]

that seems flakey issue with coveralls.

this is the latest working :

[helio-frota]

@hongbo-miao @lholmquist this may be config, I can take a look on that later #474

[richardlau]

@hongbo-miao @lholmquist this may be config, I can take a look on that later #474

@helio-frota The failure is going to be because the PR came from a fork and those can't access secrets (being used to provide the token for coverage). We may be able to change the workflow to use the pull_request_target instead of pull_request event, see https://github.blog/2020-08-03-github-actions-improvements-for-fork-and-pull-request-workflows/#improvements-for-public-repository-forks.

[richardlau]

I've rebased this after landing #476 on master and we now have a passing CI 🎉.

[lholmquist]

Thanks, @hongbo-miao

[hongbo-miao]

You are welcome : )

[ale-grosselle]

@richardlau @lholmquist Could you release this implementation in a version please?

Many thanks!