Bumping to go1.18, bumping dev tools

.github/workflows/go.yml

@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.17
+    - name: Set up Go 1.18
       uses: actions/setup-go@v2
       with:
-        go-version: 1.17
+        go-version: 1.18
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-go@v2
         with:
-          go-version: '^1.17.5'
+          go-version: '^1.18'
       - name: Compile man page markup
         id: gen-man-page-md
         run: |