update: add godoc, goreport, lincense badges in readme file, add .travis.yml

.travis.yml

@@ -0,0 +1,20 @@
+language: go
+go:
+  - 1.16.2
+  -tip
+sudo: required
+os:
+  - linux
+  - osx
+notifications:
+  email: lanliddd.2007@163.com
+before_install:
+  - go mod tidy
+
+script:
+  - echo "run"
+  - go test -race -coverprofile=coverage.txt -covermode=atomic
+  - go test -v ./...
+  
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -5,6 +5,12 @@
     </p>
 <div align="center" style="text-align: center;">
 
+![Go version](https://img.shields.io/badge/go-%3E%3D1.16-9cf)
+[![Project version](https://img.shields.io/badge/version-1.0.2-green.svg)](https://github.com/duke-git/lancet/releases)
+[![GoDoc](https://godoc.org/github.com//duke-git/lancet?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet)
+[![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet)](https://goreportcard.com/report/github.com/duke-git/lancet)
+[![License](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/duke-git/lancet/blob/main/LICENSE)
+
 </div>
 
 English | [简体中文](./README_zh-CN.md)