download from node-versions and fallback to node dist (#147)

* download LTS versions from releases

* support upcoiming ghes 

Co-authored-by: eric sciple <ericsciple@users.noreply.github.com>

README.md

@@ -8,6 +8,7 @@ This action sets by node environment for use in actions by:
 
 - optionally downloading and caching a version of node - npm by version spec and add to PATH
 - registering problem matchers for error output
+- configuring authentication for GPR or npm
 
 # Usage
 
@@ -19,7 +20,7 @@ steps:
 - uses: actions/checkout@v2
 - uses: actions/setup-node@v1
   with:
-    node-version: '10.x'
+    node-version: '12'
 - run: npm install
 - run: npm test
 ```

dist/index.js

@@ -10943,7 +10943,7 @@ function downloadTool(url, dest, auth) {
                 }
             }
             // Otherwise retry
-            return false;
+            return true;
         });
     });
 }
@@ -10965,7 +10965,6 @@ function downloadToolAttempt(url, dest, auth) {
             };
         }
         const response = yield http.get(url, headers);
-        throw new HTTPError(500);
         if (response.message.statusCode !== 200) {
             const err = new HTTPError(response.message.statusCode);
             core.debug(`Failed to download from "${url}". Code(${response.message.statusCode}) Message(${response.message.statusMessage})`);