Update the version of Go used from 1.16 to 1.18

Go 1.16 is no longer supported as of the release of 1.18 so it makes
sense to update to the latest version available.

Author: mcdonnnj

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
       - id: setup-go
         uses: actions/setup-go@v3
         with:
-          go-version: "1.16"
+          go-version: "1.18"
       - name: Lookup Go cache directory
         id: go-cache
         run: |