Release v2.0.0

- Add new chapter: Network flow base by @retrhelo (#30)
- Add new chapter: MST by @Gousheng-dd (#29)
- Add new chapter: Red blue by @Gousheng-dd (#29)
- Add new chapter: Proof of Statute by @qzylalala (#35, #45)
- Add new chapter: Approximation algorithm by @LMA936 and @Beau-Chen
  (#32)
- Add new chapter: Shortest path by @gjkk (#42)
- Add new chapter: Edit distance by @Jeckinchen and @wangnengjie (#40)
- Add new chapter: Greedy algorithm by @JerryHsh (#36)

Author: Colin

README.md

@@ -1,12 +1,12 @@
 # Welcome to algorithm-course-notes 👋
-![Version](https://img.shields.io/badge/version-1.8.0-blue.svg?cacheSeconds=2592000)
+![Version](https://img.shields.io/badge/version-2.0.0-blue.svg?cacheSeconds=2592000)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](#)
 ![build-CI](https://github.com/colinaaa/algorithm-course-notes/workflows/build-CI/badge.svg)
 ![Upload Release Asset](https://github.com/colinaaa/algorithm-course-notes/workflows/Upload%20Release%20Asset/badge.svg)
 
 > 算法课笔记
 
-### ✨[Demo](https://github.com/colinaaa/algorithm-course-notes/releases/download/v1.8.0/book-v1.8.0.pdf)
+### ✨[Demo](https://github.com/colinaaa/algorithm-course-notes/releases/download/v2.0.0/book-v1.8.0.pdf)
 
 ## 添加新章节
 

book.tex

@@ -27,7 +27,7 @@
 \author{计卓1801全体}
 \institute{华中科技大学}
 \date{\zhtoday}
-\version{1.8.0}
+\version{2.0.0}
 \logo{logo.png}
 \cover{cover.png}
 
@@ -59,4 +59,4 @@
 
 
 \bibliography{ref.bib}
-\end{document}
+\end{document}