removed use of deprecated ioutil

[skoef]

The package io/ioutil has been deprecated since Go 1.16

[skoef]

It seems CI fails because we're still supporting Go 1.15, is that really still necessary?

[lance6716]

GitHub "Used by" lists other projects that using this library. I checked about 20 active projects, only https://github.com/alibaba/ilogtail uses golang version < 1.16. No big deal. I agree on this PR.

What do you think? @atercattus

and seems golangci is still complaining about some problems, can you also fix them? @skoef

[skoef]

While not being super-descriptive, the File is not goimport-ed actually meant "I don't like the whitespace in your comments!". It is fixed now.

[lance6716]

I have changed the "required CI" for master branch, you can push again to trigger the new rules. Removing v1.15 from the test matrix is a good commit 😄 @skoef

go-mysql/.github/workflows/ci.yml

Line 8 in 4c42f69

go: [ 1.18, 1.17, 1.16, 1.15 ]