Bump baseline Go versions to 1.18.

Update actions to v3.
Go vet is commented out due to false positives in golang/go#41205.

PiperOrigin-RevId: 492508300

.github/workflows/go_tests.yml

@@ -5,15 +5,16 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: Install Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: 1.18.x
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
-      - name: Download Dependencies
-        run: go get -v -t -d ./...
+      # false positives: golang/go#41205
+      #- name: Run vet
+      #  run: go vet ./...
 
       - name: Test
         run: go test -v ./...

go.mod

@@ -1,6 +1,6 @@
 module github.com/google/certtostore
 
-go 1.17
+go 1.18
 
 require (
   github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d