Build with Go 1.16.1, and remove the whitelist of supported versions

cross/Dockerfile

@@ -45,8 +45,8 @@ RUN curl -fsSL "https://awscli.amazonaws.com/awscli-exe-linux-x86_64-2.1.21.zip"
 
 # ------------------------------------------------------------------------------------------------
 # Go support
-RUN GO_VERSION=1.14.4 && \
-    GO_HASH=aed845e4185a0b2a3c3d5e1d0a35491702c55889192bb9c30e67a3de6849c067 && \
+RUN GO_VERSION=1.16.1 && \
+    GO_HASH=3edc22f8332231c3ba8be246f184b736b8d28f06ce24f08168d8ecf052549769 && \
     curl -fsSL https://golang.org/dl/go${GO_VERSION}.linux-amd64.tar.gz -o golang.tar.gz && \
     echo "${GO_HASH}  golang.tar.gz" | sha256sum -c - && \
     tar -C /usr/local -xzf golang.tar.gz && \

makelib/golang.mk

@@ -52,9 +52,6 @@ ifeq ($(DEBUG),0)
 GO_LDFLAGS += -s -w
 endif
 
-# supported go versions
-GO_SUPPORTED_VERSIONS ?= 1.7|1.8|1.9|1.10|1.11|1.12|1.13|1.14
-
 # set GOOS and GOARCH
 GOOS := $(OS)
 GOARCH := $(ARCH)
@@ -146,10 +143,6 @@ endif
 # Go Targets
 
 go.init: go.vendor.lite
-	@if ! `$(GO) version | grep -q -E '\bgo($(GO_SUPPORTED_VERSIONS))\b'`; then \
-		$(ERR) unsupported go version. Please make install one of the following supported version: '$(GO_SUPPORTED_VERSIONS)' ;\
-		exit 1 ;\
-	fi
 	@if [ "$(GO111MODULE)" != "on" ] && [ "$(realpath ../../../..)" !=  "$(realpath $(GOPATH))" ]; then \
 		$(WARN) the source directory is not relative to the GOPATH at $(GOPATH) or you are you using symlinks. The build might run into issue. Please move the source directory to be at $(GOPATH)/src/$(GO_PROJECT) ;\
 	fi