fix: reuse comparators on subset (#537)

Author: H4ad

ranges/subset.js

@@ -68,6 +68,9 @@ const subset = (sub, dom, options = {}) => {
   return true
 }
 
+const minimumVersionWithPreRelease = [new Comparator('>=0.0.0-0')]
+const minimumVersion = [new Comparator('>=0.0.0')]
+
 const simpleSubset = (sub, dom, options) => {
   if (sub === dom) {
     return true
@@ -77,17 +80,17 @@ const simpleSubset = (sub, dom, options) => {
     if (dom.length === 1 && dom[0].semver === ANY) {
       return true
     } else if (options.includePrerelease) {
-      sub = [new Comparator('>=0.0.0-0')]
+      sub = minimumVersionWithPreRelease
     } else {
-      sub = [new Comparator('>=0.0.0')]
+      sub = minimumVersion
     }
   }
 
   if (dom.length === 1 && dom[0].semver === ANY) {
     if (options.includePrerelease) {
       return true
     } else {
-      dom = [new Comparator('>=0.0.0')]
+      dom = minimumVersion
     }
   }