bump versions

t.Setenv is in Go 1.17 or later.

.github/workflows/go.yml

@@ -11,19 +11,19 @@ jobs:
     strategy:
       matrix:
         go:
-          - 1.16
-          - 1.17
+          - "1.19"
+          - "1.20"
     name: Build
     runs-on: ubuntu-latest
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v1
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ matrix.go }}
         id: go
 
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Build & Test
         run: |

.github/workflows/release.yml

@@ -12,12 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Set up Go
-      uses: actions/setup-go@v1
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.17
+        go-version: "1.20"
 
     - name: Check out code into the Go module directory
-      uses: actions/checkout@v1
+      uses: actions/checkout@v3
 
     - name: setup tools
       run: |

go.mod

@@ -1,6 +1,6 @@
 module github.com/kayac/go-config
 
-go 1.12
+go 1.17
 
 require (
 	github.com/BurntSushi/toml v0.4.1