support 1.21, add matrix for 1.21 and 1.22 in CI

.github/workflows/go.yml

@@ -1,6 +1,3 @@
-# This workflow will build a golang project
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
-
 name: Go
 
 on:
@@ -11,13 +8,16 @@ jobs:
 
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: ['1.21', '1.22']
     steps:
     - uses: actions/checkout@v3
 
     - name: Set up Go
       uses: actions/setup-go@v4
       with:
-        go-version: '1.22'
+        go-version: ${{ matrix.go-version }}
     - name: Install Staticcheck
       run: go install honnef.co/go/tools/cmd/staticcheck@latest
     - name: Build

go.mod

@@ -1,6 +1,6 @@
 module github.com/kschamplin/gotelem
 
-go 1.22
+go 1.21
 
 require (
 	github.com/go-chi/chi/v5 v5.0.12