bump go version used by ci

Author: stackus

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
   golangci:
     strategy:
       matrix:
-        go-version: [ 1.18.x ]
+        go-version: [ 1.20.x ]
         os: [ ubuntu-latest ]
     name: lint
     runs-on: ${{ matrix.os }}
@@ -23,7 +23,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [ 1.18.x ]
+        go-version: [ 1.20.x ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
     runs-on: ${{ matrix.os }}
     steps: