Update the version of Go used from 1.18 to 1.19

Go 1.19 was released while this branch was in the wings and it makes
sense to bump to the latest Go release.

Author: mcdonnnj

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
       - id: setup-go
         uses: actions/setup-go@v3
         with:
-          go-version: "1.18"
+          go-version: "1.19"
       - name: Lookup Go cache directory
         id: go-cache
         run: |