Regular expression for matching semver versions
$ npm install --save semver-regex
var semverRegex = require('semver-regex');
semverRegex().test('v1.0.0');
//=> true
semverRegex().test('1.2.3-alpha.10.beta.0+build.unicorn.rainbow');
//=> true
semverRegex().exec('unicorn 1.0.0 rainbow')[0];
//=> 1.0.0
MIT © Sindre Sorhus