update(react-helmet): 6.1 ES exports changes

[peterblazejewicz]

This commit updates definition by:

• adding support for 6.1 change introducing named and default exports
  support (this fixes errorrs like JSX element type 'Helmet' does not have any construct or call signatures.
• minor version bump
• maintainer added

nfl/react-helmet#547
https://github.com/nfl/react-helmet/releases/tag/6.1.0

Thanks!

import Helmet from 'react-helmet';
import { default as Helmet } from 'react-helmet';
import { Helmet  } from 'react-helmet';

• 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.
• Run npm run lint package-name (or tsc if no tslint.json is present).
• Provide a URL to documentation or source code which provides context for the suggested changes
• 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.
• Include tests for your changes

[typescript-bot]

@peterblazejewicz Thank you for submitting this PR!

This is a live comment which I will keep updated.

Code Reviews

Because you edited one package and updated the tests (👏), I can help you merge this PR once someone else signs off on it.

Status

• ✅ No merge conflicts
• ✅ Continuous integration tests have passed
• ✅ Most recent commit is approved by type definition owners or DT maintainers

All of the items on the list are green. To merge, you need to post a comment including the string "Ready to merge" to bring in your changes.

---

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[typescript-bot]

🔔 @evanbb @isman-usoh @lith-light-g @sammkj @yuit @ykzts @wKovacs64 @andriy2 — 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.

[typescript-bot]

👋 Hi there! I’ve run some quick measurements against master and your PR. These metrics should help the humans reviewing this PR gauge whether it might negatively affect compile times or editor responsiveness for users who install these typings.

Let’s review the numbers, shall we?

Comparison details 📊

	master	#46509	diff
Batch compilation
Memory usage (MiB)	118.0	116.9	-0.9%
Type count	25345	25345	0%
Assignability cache size	6716	6716	0%
Language service
Samples taken	167	169	+1%
Identifiers in tests	167	169	+1%
getCompletionsAtPosition
Mean duration (ms)	573.9	565.9	-1.4%
Mean CV	8.7%	7.7%
Worst duration (ms)	739.8	728.6	-1.5%
Worst identifier	html	meta
getQuickInfoAtPosition
Mean duration (ms)	549.8	545.4	-0.8%
Mean CV	9.1%	8.7%	-4.3%
Worst duration (ms)	689.2	716.5	+4.0%
Worst identifier	hidden	hidden

It looks like nothing changed too much. I won’t post performance data again unless it gets worse.

[typescript-bot]

@peterblazejewicz Everything looks good here. Great job! I am ready to merge this PR on your behalf.

If you'd like that to happen, please post a comment saying:

Ready to merge

and I'll merge this PR almost instantly. Thanks for helping out! ❤️

(@evanbb, @isman-usoh, @lith-light-g, @sammkj, @yuit, @ykzts, @wKovacs64, @andriy2: you can do this too.)

[peterblazejewicz]

Ready to merge 🛴