support -- --fix for test-js

scripts/test-js.js

 const exec = require('shell-utils').exec;
 const _ = require('lodash');
 
+const fix = _.includes(process.argv, '--fix') ? '--fix' : '';
+
 const dirs = [
   'lib/src',
   'integration',
 
 function run() {
   const paths = _.chain(dirs).map((d) => `${d}/**/**/**/**/**/**/*`).join(' ').value();
-  exec.execSync(`xo ${paths}`);
+  exec.execSync(`xo ${paths} ${fix}`);
   exec.execSync(`jest --coverage`);
 }