feat: improve error message

Author: dominykas

lib/loader.js

@@ -45,7 +45,7 @@ internals.createPackageLoader = async (packageName) => {
                 const result = await repositoryLoader.loadFile(filename, options);
 
                 if (filename === 'package.json' && result.name !== packageName) {
-                    throw new Error(`${repository} does not contain ${packageName}`);
+                    throw new Error(`${repository} does not contain ${packageName}. Monorepo not supported: https://github.com/pkgjs/detect-node-support/issues/6`);
                 }
 
                 return result;

test/index.js

@@ -762,7 +762,7 @@ describe('detect-node-support', () => {
                     .reply(200, Fs.readFileSync(Path.join(__dirname, '..', 'package.json')));
 
                 await expect(NodeSupport.detect({ packageName: 'detect-node-support' }))
-                    .to.reject('git+https://github.com/pkgjs/detect-node-support.git does not contain detect-node-support');
+                    .to.reject('git+https://github.com/pkgjs/detect-node-support.git does not contain detect-node-support. Monorepo not supported: https://github.com/pkgjs/detect-node-support/issues/6');
             });
         });