[Refactor] importType: use is-core-module instead of resolve/lib/core

Author: JLHwung

package.json

@@ -105,6 +105,7 @@
     "eslint-import-resolver-node": "^0.3.4",
     "eslint-module-utils": "^2.6.0",
     "has": "^1.0.3",
+    "is-core-module": "^1.0.2",
     "minimatch": "^3.0.4",
     "object.values": "^1.1.1",
     "read-pkg-up": "^2.0.0",

src/core/importType.js

@@ -1,4 +1,4 @@
-import coreModules from 'resolve/lib/core'
+import isCoreModule from 'is-core-module'
 
 import resolve from 'eslint-module-utils/resolve'
 
@@ -20,7 +20,7 @@ export function isBuiltIn(name, settings, path) {
   if (path || !name) return false
   const base = baseModule(name)
   const extras = (settings && settings['import/core-modules']) || []
-  return coreModules[base] || extras.indexOf(base) > -1
+  return isCoreModule(base) || extras.indexOf(base) > -1
 }
 
 function isExternalPath(path, name, settings) {