github: add Go 1.22 testing

Author: dfawley

.github/workflows/testing.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup Go
         uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
         with:
-          go-version: '1.21'
+          go-version: '1.22'
       - name: Checkout repo
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
 
@@ -46,32 +46,31 @@ jobs:
       matrix:
         include:
           - type: vet
-            goversion: '1.21'
+            goversion: '1.22'
+
+          - type: extras
+            goversion: '1.22'
 
           - type: tests
-            goversion: '1.21'
+            goversion: '1.22'
 
           - type: tests
-            goversion: '1.21'
+            goversion: '1.22'
             testflags: -race
 
           - type: tests
-            goversion: '1.21'
+            goversion: '1.22'
             goarch: 386
 
           - type: tests
-            goversion: '1.21'
+            goversion: '1.22'
             goarch: arm64
 
           - type: tests
-            goversion: '1.20'
-
-          - type: tests
-            goversion: '1.19'
-
-          - type: extras
             goversion: '1.21'
 
+          - type: tests
+            goversion: '1.20'
     steps:
       # Setup the environment.
       - name: Setup GOARCH