Fix ReDoS vulnerability

Author: sindresorhus

index.js

@@ -1,3 +1,3 @@
 export default function semverRegex() {
-	return /(?<=^v?|\sv?)(?:(?:0|[1-9]\d*)\.){2}(?:0|[1-9]\d*)(?:-(?:0|[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*)(?:\.(?:0|[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*))*)?(?:\+[\da-z-]+(?:\.[\da-z-]+)*)?\b/gi;
+	return /(?:(?<=^v?|\sv?)(?:(?:0|[1-9]\d{0,9})\.){2}(?:0|[1-9]\d{0,9})(?:-(?:0|[1-9]\d*?|[\da-z-]*?[a-z-][\da-z-]*?){0,100}(?:\.(?:0|[1-9]\d*?|[\da-z-]*?[a-z-][\da-z-]*?))*?){0,100}(?:\+[\da-z-]+?(?:\.[\da-z-]+?)*?){0,100}\b){1,200}/gi;
 }

readme.md

@@ -26,7 +26,7 @@ semverRegex().exec('unicorn 1.0.0 rainbow')[0];
 //=> ['1.0.0', '2.1.3']
 ```
 
-**Note:** For versions coming from user-input, it's up to you to truncate the string to a sensible length to prevent abuse. For example, 100 length.
+**Note:** For versions coming from user-input, you are recommended to truncate the string to a sensible length to prevent abuse. For example, 100 length.
 
 ## Related
 

test.js

@@ -12,7 +12,8 @@ const fixtures = [
 	'2.7.2-foo+bar',
 	'1.2.3-alpha.10.beta',
 	'1.2.3-alpha.10.beta+build.unicorn.rainbow',
-	'foo 0.0.0 bar 0.0.0'
+	'foo 0.0.0 bar 0.0.0',
+	'99999.99999.99999'
 ];
 
 test('matches semver versions on test', t => {
@@ -110,4 +111,12 @@ test('invalid version does not cause catatrophic backtracking', t => {
 		`v1.1.3-0aa${postfix}$`,
 		semverRegex()
 	);
+
+	for (let index = 1; index <= 50000; index++) {
+		const start = Date.now();
+		const fixture = `0.0.0-0${'.-------'.repeat(index)}@`;
+		semverRegex().test(fixture);
+		const difference = Date.now() - start;
+		t.true(difference < 10, `Execution time: ${difference}`);
+	}
 });