refactor(nvm): use autoReplace

lib/manager/nvm/index.ts

@@ -2,7 +2,8 @@ import { LANGUAGE_NODE } from '../../constants/languages';
 import * as nodeVersioning from '../../versioning/node';
 
 export { extractPackageFile } from './extract';
-export { updateDependency } from './update';
+
+export const autoReplace = true;
 
 export const language = LANGUAGE_NODE;
 

lib/manager/nvm/update.spec.ts

-import { updateDependency } from './update';
-
-describe('manager/nvm/update', () => {
-  describe('updateDependency', () => {
-    it('updates values', () => {
-      const upgrade = {
-        newValue: '8.9.1',
-      };
-      const res = updateDependency({ fileContent: '8.9.0\n', upgrade });
-      expect(res).toMatchSnapshot();
-    });
-  });
-});

lib/manager/nvm/update.ts

-import { logger } from '../../logger';
-import { UpdateDependencyConfig } from '../common';
-
-export function updateDependency({ upgrade }: UpdateDependencyConfig): string {
-  logger.debug(`nvm.updateDependency(): ${upgrade.newVersion}`);
-  return `${upgrade.newValue}\n`;
-}