安装指令 go get -u github.com/astaxie/beego
下面是安装过程报的错误：
```
# github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:293: hello.SupportedProtos undefined (type *tls.ClientHelloInfo has no field or method SupportedProtos)
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:303: hello.SignatureSchemes undefined (type *tls.ClientHelloInfo has no field or method SignatureSchemes)
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:306: hello.SignatureSchemes undefined (type *tls.ClientHelloInfo has no field or method SignatureSchemes)
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:307: undefined: tls.SignatureScheme
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:309: undefined: tls.ECDSAWithP256AndSHA256
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:310: undefined: tls.ECDSAWithP384AndSHA384
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:310: undefined: tls.ECDSAWithP521AndSHA512
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:336: undefined: tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
../github.com/astaxie/beego/vendor/golang.org/x/crypto/acme/autocert/autocert.go:339: undefined: tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305
# github.com/astaxie/beego/context
../github.com/astaxie/beego/context/context.go:257: undefined: http.Pusher
../github.com/astaxie/beego/context/context.go:258: undefined: http.Pusher
../github.com/astaxie/beego/context/output.go:291: undefined: url.PathEscape
```
大家帮我看看什么原因，一直报这个错误，谢谢????
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