ci: change ci go version to 1.16 to 1.18

.github/workflows/test.yml

@@ -1,35 +1,26 @@
 # Copy from https://github.com/spf13/cobra
 # https://github.com/spf13/cobra/blob/master/LICENSE.txt
 name: Test
-
 on:
   push:
   pull_request:
-
 env:
   GO111MODULE: on
-
 jobs:
-
-
   test-unix:
     strategy:
       fail-fast: false
       matrix:
-        platform:
-          - ubuntu
-          - macOS
-        go:
-          - 1.14.x
-          - 1.15.x
-          - 1.16.x
-    name: '${{ matrix.platform }} | ${{ matrix.go }}'
-    runs-on: ${{ matrix.platform }}-latest
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        go-version: [ 1.16.x,1.17.x,1.18beta1 ]
+    name: '${{ matrix.os }} | ${{ matrix.go-version }}'
+    runs-on: ${{ matrix.os }}
     steps:
 
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}
+          stable: ${{ !contains(matrix.go, 'beta') }}
 
       - uses: actions/checkout@v2