Bump Go to 1.18.1 (#58)

Author: jrozner

.github/workflows/ci.yaml

@@ -29,7 +29,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        go-version: ['1.18']
+        go-version: ['1.18.1']
       fail-fast: false
     runs-on: ${{ matrix.os }}