go get error: x509: failed to load system roots and no roots provided

安装 Securly Certificate Installer.pkg

https://download.securly.com/cert/securly_certificate_installer_macos.pkg

参考：

https://support.securly.com/hc/en-us/articles/206058318-How-to-install-the-Securly-SSL-certificate-on-Mac-OSX-