fix(config): rename project config file from smartconfig.json to .smartconfig.json

ts/classes.smartconfig.ts

@@ -58,7 +58,7 @@ export class Smartconfig {
    */
   private checkLookupPath() {
     if (this.cwd) {
-      this.lookupPath = plugins.path.join(this.cwd, 'smartconfig.json');
+      this.lookupPath = plugins.path.join(this.cwd, '.smartconfig.json');
     } else {
       this.lookupPath = paths.configFile;
     }