docs: add build status

Author: Brooooooklyn

README.md

@@ -1,3 +1,6 @@
 # py-sourcemap
 
+[![CircleCI](https://circleci.com/gh/LeetCode-OpenSource/py-sourcemap.svg?style=svg)](https://circleci.com/gh/LeetCode-OpenSource/py-sourcemap)
+[![Build Status](https://travis-ci.com/LeetCode-OpenSource/py-sourcemap.svg?branch=master)](https://travis-ci.com/LeetCode-OpenSource/py-sourcemap)
+
 A tiny [source-map-mappings](https://github.com/fitzgen/source-map-mappings) bindings for python using [PyO3](https://github.com/PyO3/pyo3)