fixed CI to use setup-go

Author: Code-Hex

.github/workflows/test.yml

@@ -12,16 +12,11 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-    # https://github.com/actions/setup-go/issues/21#issuecomment-565704236
-    - name: Install gotip
-      run: |
-        git clone --depth=1 https://go.googlesource.com/go $HOME/gotip
-        cd $HOME/gotip/src
-        ./make.bash
-        echo "GOROOT=$HOME/gotip" >> $GITHUB_ENV
-        echo "$HOME/gotip/bin:$PATH" >> $GITHUB_PATH
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
+    - uses: actions/setup-go@v2
+      with:
+        go-version: '^1.18'
     - name: Declare some variables
       id: vars
       run: |