Update minimal supported go version to 1.21

.github/workflows/codecov.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
-          go-version: 1.22.x
+          go-version: 1.21.x
           cache: false
 
       - name: Download dependencies

Makefile

@@ -33,7 +33,7 @@ BIN := $(BUILD)/bin
 #
 # this can _likely_ remain a major version, as fmt output does not tend to change in minor versions,
 # which will allow findstring to match any minor version.
-EXPECTED_GO_VERSION := go1.19
+EXPECTED_GO_VERSION := go1.21
 CURRENT_GO_VERSION := $(shell go version)
 ifeq (,$(findstring $(EXPECTED_GO_VERSION),$(CURRENT_GO_VERSION)))
 # if you are seeing this warning: consider using https://github.com/travis-ci/gimme to pin your version

docker/buildkite/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19.5
+FROM golang:1.21
 
 RUN mkdir -p /go/src/go.uber.org/cadence
 WORKDIR /go/src/go.uber.org/cadence

go.mod

@@ -1,6 +1,6 @@
 module go.uber.org/cadence
 
-go 1.19
+go 1.21
 
 require (
 	github.com/apache/thrift v0.16.0

internal/tools/go.mod

@@ -1,6 +1,6 @@
 module go.uber.org/cadence/internal/tools
 
-go 1.19
+go 1.21
 
 require (
 	github.com/kisielk/errcheck v1.6.3