feat(deps): bump supported Go versions to 1.22 and 1.21

.github/variables/go-versions.env

@@ -1,2 +1,2 @@
-latest=1.18
-penultimate=1.19
+latest=1.22
+penultimate=1.21

README.md

@@ -8,7 +8,10 @@
 
 ## Supported Go versions
 
-This version of the LaunchDarkly SDK requires a Go version of 1.18 or higher.
+This version of the LaunchDarkly SDK supports Go version 1.21 or higher. 
+
+The policy for this SDK follows that of the official Go [Release Policy](https://go.dev/doc/devel/release): each major Go release is supported until there
+are two newer major releases.
 
 ## Getting started
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/launchdarkly/go-server-sdk/v7
 
-go 1.18
+go 1.21
 
 require (
 	github.com/fsnotify/fsnotify v1.4.7

go.sum

@@ -12,7 +12,9 @@ github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFF
 github.com/karlseguin/expect v1.0.2-0.20190806010014-778a5f0c6003 h1:vJ0Snvo+SLMY72r5J4sEfkuE7AFbixEP2qRbEcum/wA=
 github.com/karlseguin/expect v1.0.2-0.20190806010014-778a5f0c6003/go.mod h1:zNBxMY8P21owkeogJELCLeHIt+voOSduHYTFUbwRAV8=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/launchdarkly/ccache v1.1.0 h1:voD1M+ZJXR3MREOKtBwgTF9hYHl1jg+vFKS/+VAkR2k=
 github.com/launchdarkly/ccache v1.1.0/go.mod h1:TlxzrlnzvYeXiLHmesMuvoZetu4Z97cV1SsdqqBJi1Q=
 github.com/launchdarkly/eventsource v1.6.2 h1:5SbcIqzUomn+/zmJDrkb4LYw7ryoKFzH/0TbR0/3Bdg=
@@ -67,6 +69,7 @@ golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/ghodss/yaml.v1 v1.0.0 h1:JlY4R6oVz+ZSvcDhVfNQ/k/8Xo6yb2s1PBhslPZPX4c=
 gopkg.in/ghodss/yaml.v1 v1.0.0/go.mod h1:HDvRMPQLqycKPs9nWLuzZWxsxRzISLCRORiDpBUOMqg=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

testservice/go.mod

@@ -1,6 +1,6 @@
 module github.com/launchdarkly/go-server-sdk/v7/testservice
 
-go 1.18
+go 1.21
 
 require (
 	github.com/gorilla/mux v1.8.0