fix(LoadConfig): fixed issue with loading config files

also added useEslintrc to config for using package.main entry. This
should have been set to false originally.

src/load-config.ts

@@ -18,14 +18,14 @@ class LoadConfig {
     let cli = null;
 
     if (configFile) {
-      cwd = path.dirname(configFile);
       cli = new CLIEngine({
         useEslintrc: false,
         configFile,
         cwd
       });
     } else {
       cli = new CLIEngine({
+        useEslintrc: false,
         configFile: pack.main,
         cwd
       });