min go version is now 1.16

Author: blotus

README.md

@@ -8,7 +8,7 @@
 
 CFSSL is CloudFlare's PKI/TLS swiss army knife. It is both a command line
 tool and an HTTP API server for signing, verifying, and bundling TLS
-certificates. It requires Go 1.12+ to build.
+certificates. It requires Go 1.16+ to build.
 
 Note that certain linux distributions have certain algorithms removed
 (RHEL-based distributions in particular), so the golang from the
@@ -30,7 +30,7 @@ CFSSL consists of:
 ### Building
 
 Building cfssl requires a
-[working Go 1.12+ installation](http://golang.org/doc/install).
+[working Go 1.16+ installation](http://golang.org/doc/install).
 
 ```
 $ git clone git@github.com:cloudflare/cfssl.git
@@ -60,7 +60,7 @@ You can set the `GOOS` and `GOARCH` environment variables to have Go cross compi
 
 ### Installation
 
-Installation requires a [working Go 1.14+ installation](http://golang.org/doc/install).
+Installation requires a [working Go 1.16+ installation](http://golang.org/doc/install).
 Alternatively, [prebuilt binaries are available](https://github.com/cloudflare/cfssl/releases)
 
 ```