[New] add fs/promises to the list of core modules

introduced in nodejs/node@329fc78e49

Author: shinnn

lib/core.js

@@ -2,8 +2,8 @@ var current = (process.versions && process.versions.node && process.versions.nod
 
 function specifierIncluded(specifier) {
     var parts = specifier.split(' ');
-    var op = parts[0];
-    var versionParts = parts[1].split('.');
+    var op = parts.length > 1 ? parts[0] : '=';
+    var versionParts = (parts.length > 1 ? parts[1] : parts[0]).split('.');
 
     for (var i = 0; i < 3; ++i) {
         var cur = Number(current[i] || 0);

lib/core.json

@@ -15,6 +15,7 @@
     "events": true,
     "freelist": "< 6",
     "fs": true,
+    "fs/promises": ">= 10 && < 10.1",
     "_http_agent": ">= 0.11.1",
     "_http_client": ">= 0.11.1",
     "_http_common": ">= 0.11.1",