[ValidatorJS] Add isISO31661Alpha3

[henrikra]

I noticed that ValidatorJS has isISO31661Alpha3 but the types don't have it.

• Use a meaningful title for the pull request. Include the name of the package modified.
• Test the change in your own code. (Compile and run.)
• Add or edit tests to reflect the change. (Run with npm test.)
• Follow the advice from the readme.
• Avoid common mistakes.
• Run npm run lint package-name (or tsc if no tslint.json is present).

Select one of these and delete the others:

If changing an existing definition:

• Provide a URL to documentation or source code which provides context for the suggested changes: https://github.com/validatorjs/validator.js#validators
• If this PR brings the type definitions up to date with a new version of the JS library, update the version number in the header.
• If you are making substantial changes, consider adding a tslint.json containing { "extends": "dtslint/dt.json" }.

[typescript-bot]

@henrikra Thank you for submitting this PR!

🔔 @tgfjt @chrootsu @IOAyman @louy @kacepe @deptno @builtinnya @qqilihq @keatz55 - please review this PR in the next few days. Be sure to explicitly select Approve or Request Changes in the GitHub UI so I know what's going on.

If no reviewer appears after a week, a DefinitelyTyped maintainer will review the PR instead.

[henrikra]

@osdiab @kacepe @amcasey Can you guys check this out? :)

[typescript-bot]

👋 Hi there! I’ve run some quick performance metrics against master and your PR. This is still an experiment, so don’t panic if I say something crazy! I’m still learning how to interpret these metrics.

Let’s review the numbers, shall we?

Comparison details 📊

	master	#36978	diff
Batch compilation
Memory usage (MiB)	35.9	36.0	+0.2%
Type count	2364	2365	0.0%
Assignability cache size	119	119	0.0%
Subtype cache size	0	0
Identity cache size	0	0
Language service
Samples taken	1388	1397	+0.6%
Identifiers in tests	1388	1397	+0.6%
getCompletionsAtPosition
Mean duration (ms)	124.0	126.2	+1.8%
Median duration (ms)	122.5	124.3	+1.5%
Mean CV	17.5%	17.7%	+1.4%
Worst duration (ms)	305.6	315.0	+3.1%
Worst identifier	extend	extend
getQuickInfoAtPosition
Mean duration (ms)	116.7	118.3	+1.4%
Median duration (ms)	117.6	118.0	+0.4%
Mean CV	17.0%	17.2%	+1.1%
Worst duration (ms)	171.9	185.6	+7.9%
Worst identifier	extend	_normalizeEmail

It looks like nothing changed too much. I’m pretty lenient since I’m still an experiment, so take a look anyways and make sure nothing looks out of place.

---

If you have any questions or comments about me, you can ping @andrewbranch. Have a nice day!

[osdiab]

Looks about right to me!

[henrikra]

@osdiab so what happens next?

[osdiab]

@henrikra I'm not a maintainer, so we just wait for one of them to show up, give it the thumbs up and then merge in. Shouldn't be too long! But if none of them show up in a reasonable timeframe typescript-bot will loop in DefinitelyTyped people to review it instead.

[typescript-bot]

After 5 days, no one has reviewed the PR 😞. A maintainer will be reviewing the PR in the next few days and will either merge it or request revisions. Thank you for your patience!