feat: Deprecate and replace Bool,Int,Int64,String with Ptr using generics

[alexandear]

This PR proposes adding a new helper routine github.Ptr that can be used instead of existing github.Bool, github.Int, github.Int64, github.String.

NOTE that this PR bumps the minimum required version of Go from 1.17 to 1.18.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 92.27%. Comparing base (2b8c7fa) to head (e9f8516).
Report is 193 commits behind head on master.

Files with missing lines	Patch %	Lines
example/actionpermissions/main.go	0.00%	3 Missing ⚠️
example/commitpr/main.go	0.00%	3 Missing ⚠️
example/newfilewithappauth/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@## master #3355 +/- ##
==========================================
- Coverage 97.72% 92.27% -5.45% 
==========================================
Files 153 176 +23 Lines 13390 15033 +1643 ==========================================
+ Hits 13085 13872 +787 - Misses 215 1068 +853 - Partials 90 93 +3 

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[gmlewis]

I have mixed feelings about this change.

While I'm a huge fan of generics, that would change our base requirements of this repo from a minimum Go version of 1.17 to 1.18, if I'm not mistaken.

I have not heard any requests to maintain support for old versions of Go, and we have always officially tested the most recent release of Go and the prior minor version.

Let's see if this generates any discussion, pro or con.

Meanwhile, if we move forward with this, we should probably convert all the existing usages to Ptr.

[gmlewis]

OK, I'm reviewing now. Please refrain from force-pushing if possible, as we always squash-and-merge in this repo so the commit history will be clean, and this will make reviewing changes in the PR much easier for the reviewer(s). Thanks.

[gmlewis]

Thank you, @alexandear !
LGTM.

Awaiting second LGTM+Approval from any other contributor to this repo before merging (along with any discussion for or against this change, as usual, of course).

[alexandear]

Just for the reference: xanzy/go-gitlab deprecated gitlab.String, gitlab.Bool, gitlab.Int in favor of gitlab.Ptr in xanzy/go-gitlab#1788 one year ago.

[stevehipwell]

LGTM - But as a caveat I've not reviewed every line of code.

[gmlewis]

@alexandear - hearing no complaints about this PR, and having received one other LGTM (thank you, @stevehipwell !), let's go ahead and move forward with it.
If you could please merge the latest master into this PR and make sure it all still works, that would be greatly appreciated.
Thank you!

[alexandear]

If you could please merge the latest master into this PR and make sure it all still works, that would be greatly appreciated.

Merged

[gmlewis]

Thank you, @alexandear !
Merging.