message: fix(babel-preset-umi): ci
diff: import { deepmerge, winPath } from '@umijs/utils';
  -import path from 'path';
  +import { join } from 'path';
  import { transform } from '@babel/core';
  const DEFAULT_OPTS = {
  @@ -169,7 +169,7 @@ test('transform runtime', () => {
  },
  transformRuntime: {},
  });
  - expect(winPath(code!)).toContain(
  + expect(winPath(join(code!))).toContain(
  `node_modules/@babel/runtime/helpers/classCallCheck"));`,
  );
  });
  