ci: bump go versions

.github/workflows/go.yml

@@ -19,7 +19,7 @@ jobs:
     - name: set up golang
       uses: actions/setup-go@v2
       with:
-        go-version: 1.17
+        go-version: 1.18
 
     - name: format
       run: ./hack/check-format.sh
@@ -42,7 +42,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        go: [ '1.15', '1.16', '1.17' ]
+        go: [ '1.18', '1.19']
     steps:
     - uses: actions/checkout@v2
 
@@ -63,7 +63,7 @@ jobs:
     runs-on: windows-2019
     strategy:
       matrix:
-        go: [ '1.16' ]
+        go: [ '1.18' ]
     steps:
     - uses: actions/checkout@v2
 
@@ -91,7 +91,7 @@ jobs:
     runs-on: macos-10.15
     strategy:
       matrix:
-        go: [ '1.16' ]
+        go: [ '1.18' ]
     steps:
     - uses: actions/checkout@v2