code: function genAttrs(attrs) {
      return _.reduce(attrs, (acc, v, k) => {
          let attr = ` ${k}`;
          if (v !== true) {
              attr += `="${v}"`;
          }
          return acc + attr;
      }, '');
  }
docs: Given a key-value object of attributes, compose the attribute potion of the Vue Single File Component tag  Example: genAttrs({ foo: 'bar', baz: 'qux' })  => ' foo="bar" baz="qux"'