fix: use Map.get()...

Author: dominykas

lib/loader.js

@@ -93,7 +93,7 @@ internals.createRepositoryLoader = (repository) => {
 
             if (options === undefined && internals.cache.has(url)) {
                 internals.log('From cache: %s', url);
-                return internals.cache[url];
+                return internals.cache.get(url);
             }
 
             try {

test/travis.js

@@ -156,6 +156,11 @@ describe('.travis.yml parsing', () => {
                 resolved: { '14': '14.3.0' }
             }
         });
+
+        // verify cache returns the same result
+        const result2 = await NodeSupport.detect({ path: fixture.path });
+        internals.assertCommit(result2);
+        expect(result2).to.equal(result);
     });
 
     it('resolves and merges (prepend/append)', async () => {