Bump minimum Go version to 1.20

* Bump Go tooling to use 1.20.x for release and testing.
```
Scanning your code and 207 packages across 19 dependent modules for known vulnerabilities...

Vulnerability #1: GO-2023-2043
    Improper handling of special tags within script contexts in html/template
  More info: https://pkg.go.dev/vuln/GO-2023-2043
  Standard library
    Found in: html/template@go1.19.8
    Fixed in: html/template@go1.21.1
    Example traces found:
      #1: cmd/troubleshoot.go:127:20: cmd.Status.compile calls template.Template.Execute

Vulnerability exercism#2: GO-2023-2041
    Improper handling of HTML-like comments in script contexts in html/template
  More info: https://pkg.go.dev/vuln/GO-2023-2041
  Standard library
    Found in: html/template@go1.19.8
    Fixed in: html/template@go1.21.1
    Example traces found:
      #1: cmd/troubleshoot.go:127:20: cmd.Status.compile calls template.Template.Execute

Vulnerability exercism#3: GO-2023-1987
    Large RSA keys can cause high CPU usage in crypto/tls
  More info: https://pkg.go.dev/vuln/GO-2023-1987
  Standard library
    Found in: crypto/tls@go1.19.8
    Fixed in: crypto/tls@go1.21rc4
    Example traces found:
      #1: api/client.go:68:25: api.Client.Do calls http.Client.Do, which eventually calls tls.Conn.HandshakeContext
      exercism#2: cli/cli.go:199:23: cli.extractBinary calls io.Copy, which eventually calls tls.Conn.Read
      exercism#3: debug/debug.go:32:14: debug.Printf calls fmt.Fprintf, which calls tls.Conn.Write
      exercism#4: api/client.go:68:25: api.Client.Do calls http.Client.Do, which eventually calls tls.Dialer.DialContext

Vulnerability exercism#4: GO-2023-1878
    Insufficient sanitization of Host header in net/http
  More info: https://pkg.go.dev/vuln/GO-2023-1878
  Standard library
    Found in: net/http@go1.19.8
    Fixed in: net/http@go1.20.6
    Example traces found:
      #1: api/client.go:68:25: api.Client.Do calls http.Client.Do
      exercism#2: cmd/troubleshoot.go:206:32: cmd.apiPing.Call calls http.Client.Get

Vulnerability exercism#5: GO-2023-1840
    Unsafe behavior in setuid/setgid binaries in runtime
  More info: https://pkg.go.dev/vuln/GO-2023-1840
  Standard library
    Found in: runtime@go1.19.8
    Fixed in: runtime@go1.20.5
    Example traces found:
      #1: debug/debug.go:80:12: debug.DumpResponse calls log.Fatal, which eventually calls runtime.Caller
      exercism#2: workspace/exercise_metadata.go:39:26: workspace.NewExerciseMetadata calls json.Unmarshal, which eventually calls runtime.Callers
      exercism#3: workspace/exercise_metadata.go:39:26: workspace.NewExerciseMetadata calls json.Unmarshal, which eventually calls runtime.CallersFrames
      exercism#4: workspace/exercise_metadata.go:39:26: workspace.NewExerciseMetadata calls json.Unmarshal, which eventually calls runtime.Frames.Next
      exercism#5: cmd/root.go:39:27: cmd.Execute calls cobra.Command.Execute, which eventually calls runtime.GC
      exercism#6: workspace/exercise_metadata.go:66:24: workspace.ExerciseMetadata.Write calls json.Marshal, which eventually calls runtime.GOMAXPROCS
      exercism#7: config/config.go:57:18: config.Dir calls os.Getenv, which eventually calls runtime.GOROOT
      exercism#8: cli/cli.go:202:29: cli.extractBinary calls os.File.Seek, which eventually calls runtime.KeepAlive
      exercism#9: cli/cli.go:135:2: cli.CLI.Upgrade calls os.File.Close, which eventually calls runtime.SetFinalizer
      exercism#10: debug/debug.go:32:14: debug.Printf calls fmt.Fprintf, which eventually calls runtime.Stack
      exercism#11: cmd/root.go:39:27: cmd.Execute calls cobra.Command.Execute, which eventually calls runtime.TypeAssertionError.Error
      exercism#12: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which calls runtime.defaultMemProfileRate
      exercism#13: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which calls runtime.efaceOf
      exercism#14: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which eventually calls runtime.findfunc
      exercism#15: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which calls runtime.float64frombits
      exercism#16: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which eventually calls runtime.forcegchelper
      exercism#17: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which eventually calls runtime.funcMaxSPDelta
      exercism#18: cmd/root.go:39:27: cmd.Execute calls cobra.Command.Execute, which eventually calls runtime.plainError.Error
      exercism#19: workspace/test_configurations.go:5:2: workspace.init calls runtime.init, which eventually calls runtime.throw

Vulnerability exercism#6: GO-2023-1753
    Improper handling of empty HTML attributes in html/template
  More info: https://pkg.go.dev/vuln/GO-2023-1753
  Standard library
    Found in: html/template@go1.19.8
    Fixed in: html/template@go1.20.4
    Example traces found:
      #1: cmd/troubleshoot.go:127:20: cmd.Status.compile calls template.Template.Execute

Vulnerability exercism#7: GO-2023-1752
    Improper handling of JavaScript whitespace in html/template
  More info: https://pkg.go.dev/vuln/GO-2023-1752
  Standard library
    Found in: html/template@go1.19.8
    Fixed in: html/template@go1.20.4
    Example traces found:
      #1: cmd/troubleshoot.go:127:20: cmd.Status.compile calls template.Template.Execute

Vulnerability exercism#8: GO-2023-1751
    Improper sanitization of CSS values in html/template
  More info: https://pkg.go.dev/vuln/GO-2023-1751
  Standard library
    Found in: html/template@go1.19.8
    Fixed in: html/template@go1.20.4
    Example traces found:
      #1: cmd/troubleshoot.go:127:20: cmd.Status.compile calls template.Template.Execute
```

Author: nywilken

.github/workflows/ci.yml

@@ -18,8 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         go-version:
-          - '1.19'
-          - '1.20'
+          - '1.20.x'
           - '1.21.x'
         os: [ubuntu-latest, windows-latest, macOS-latest]
 

.github/workflows/release.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@93397bea11091df50f3d7e59dc26a7711a8bcfbe # v4.1.0
         with:
-          go-version: '1.19'
+          go-version: '1.20.x'
 
       - name: Import GPG Key
         id: import_gpg

CONTRIBUTING.md

@@ -8,7 +8,7 @@ Exercism would be impossible without people like you being willing to spend time
 
 ## Dependencies
 
-You'll need Go version 1.11 or higher. Follow the directions on http://golang.org/doc/install
+You'll need Go version 1.20 or higher. Follow the directions on http://golang.org/doc/install
 
 ## Development
 

go.mod

@@ -1,6 +1,6 @@
 module github.com/exercism/cli
 
-go 1.19
+go 1.20
 
 require (
 	github.com/blang/semver v3.5.1+incompatible