v0.1.3

A more friendly version that supports lower versions of Golang.
This version supports go with version >= 1.18 while the previous version needs go with version >= 1.21

v0.1.2

Golang is a good programming language, it is simple and powerful, and I will continue to write it in a long time.
But always writing similar codes repeatedly is frustrating.
So I transplant some convenient features from Python and JavaScript to Golang by creating this library.
The name 'flex' means that it is powerful and easy-to-use just like FlexBox in CSS.
Let's better enjoy writing Golang with it!