Remove version from react-dom as it doesn't exist.

[ealush]

Removing the version property from react-dom client entry as it doesn't exist and it hasn't been there since version 16.0.0.
facebook/react#15780

• 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.)
• 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:

• Provide a URL to documentation or source code which provides context for the suggested changes: [FIX] - ReactDOM Add back version property to client facebook/react#15780

[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	#42072	diff
Batch compilation
Memory usage (MiB)	120.4	121.1	+0.6%
Type count	23704	23704	0%
Assignability cache size	53713	53713	0%
Language service
Samples taken	422	422	0%
Identifiers in tests	422	422	0%
getCompletionsAtPosition
Mean duration (ms)	526.6	529.1	+0.5%
Mean CV	8.2%	8.5%
Worst duration (ms)	690.9	691.3	+0.1%
Worst identifier	React	rootElement
getQuickInfoAtPosition
Mean duration (ms)	526.2	525.1	-0.2%
Mean CV	8.6%	8.3%	-3.6%
Worst duration (ms)	723.2	669.3	-7.4%
Worst identifier	renderIntoDocument	element

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