Create codeql.yml

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.90%. Comparing base (393e5e4) to head (1c33cf2).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #17 +/- ## ======================================= Coverage 90.90% 90.90% ======================================= Files 2 2 Lines 11 11 Branches 6 6 ======================================= Hits 10 10 Partials 1 1 ``` | [Flag](https://app.codecov.io/gh/mengdemao/lazybsd/pull/17/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%AD%9F%E5%BE%B7%E8%8C%82) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/mengdemao/lazybsd/pull/17/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%AD%9F%E5%BE%B7%E8%8C%82) | `90.90% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=%E5%AD%9F%E5%BE%B7%E8%8C%82#carryforward-flags-in-the-pull-request-comment) to find out more.

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