fix(exports): node 13.0-13.6 require a string fallback (#103)
fix(exports): node 13.0-13.6 require a string fallback (#103)

package.json’s "engines" field claims yargs-parser supports node >= 10; node v13.0-v13.6 are included in this semver range. This change is required to be able to require() from yargs-parser successfully in these versions.

See https://github.com/yargs/yargs/pull/1776
yargs/y18n,yargs/y18n,bcoe/y18n