v0.0.6

• output error messages to stderr instead of stdout.

v0.0.5

修复 leetcode / leetocde add 命令时，渲染 reamd.md 文件中表格的title错误

v0.0.4

1. 250 leetcodes

v0.0.3

1.fix regular matching of READMD.md failed, unable to parse the 难度 field

add the difficulty of leetcode in readme.md

1. add difficulty of leetcode in readme.md
2. Optimize the code

rebuild `leetcode` script

1.rebuild leetcode script
2.new format in readme.md