Update required golang version to 1.16

.circleci/config.yml

@@ -7,7 +7,7 @@ orbs:
 executors:
   golang:
     docker:
-      - image: circleci/golang:1.15.5
+      - image: circleci/golang:1.16.4
     resource_class: 2xlarge
   ubuntu:
     docker:
@@ -379,8 +379,8 @@ jobs:
       - run:
           name: Install go
           command: |
-            curl -O https://dl.google.com/go/go1.15.5.darwin-amd64.pkg && \
-            sudo installer -pkg go1.15.5.darwin-amd64.pkg -target /
+            curl -O https://dl.google.com/go/go1.16.4.darwin-amd64.pkg && \
+            sudo installer -pkg go1.16.4.darwin-amd64.pkg -target /
       - run:
           name: Install pkg-config
           command: HOMEBREW_NO_AUTO_UPDATE=1 brew install pkg-config

Makefile

@@ -6,9 +6,9 @@ all: build
 unexport GOFLAGS
 
 GOVERSION:=$(shell go version | cut -d' ' -f 3 | sed 's/^go//' | awk -F. '{printf "%d%03d%03d", $$1, $$2, $$3}')
-ifeq ($(shell expr $(GOVERSION) \< 1015005), 1)
+ifeq ($(shell expr $(GOVERSION) \< 1016000), 1)
 $(warning Your Golang version is go$(shell expr $(GOVERSION) / 1000000).$(shell expr $(GOVERSION) % 1000000 / 1000).$(shell expr $(GOVERSION) % 1000))
-$(error Update Golang to version to at least 1.15.5)
+$(error Update Golang to version to at least 1.16.0)
 endif
 
 # git modules that need to be loaded

README.md

@@ -10,7 +10,7 @@
   <a href="https://circleci.com/gh/filecoin-project/lotus"><img src="https://circleci.com/gh/filecoin-project/lotus.svg?style=svg"></a>
   <a href="https://codecov.io/gh/filecoin-project/lotus"><img src="https://codecov.io/gh/filecoin-project/lotus/branch/master/graph/badge.svg"></a>
   <a href="https://goreportcard.com/report/github.com/filecoin-project/lotus"><img src="https://goreportcard.com/badge/github.com/filecoin-project/lotus" /></a>  
-  <a href=""><img src="https://img.shields.io/badge/golang-%3E%3D1.15.5-blue.svg" /></a>
+  <a href=""><img src="https://img.shields.io/badge/golang-%3E%3D1.16-blue.svg" /></a>
   <br>
 </p>