chore: changed golang-related CI configuration and update document (#204

)

* chore: update to golang 1.20

* chore: bump setup-go version to v4.1.0 and using go-version-file input

.github/workflows/build.yml

@@ -9,9 +9,9 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: Set up Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4.1.0
       with:
-        go-version: '1.20.x'
+        go-version-file: 'go.mod'
 
     - name: Gofmt
       run: ./scripts/gofmt.sh

.github/workflows/release.yml

@@ -26,9 +26,9 @@ jobs:
         run: git fetch --prune --unshallow
       -
         name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v4.1.0
         with:
-          go-version: '1.20.x'
+          go-version-file: 'go.mod'
       -
         name: Import GPG key
         id: import_gpg

README.md

@@ -3,7 +3,7 @@
 
 ## Requirements
 * [Terraform](https://www.terraform.io/downloads.html) > 0.12.x
-* [Go](https://golang.org/doc/install) 1.18
+* [Go](https://golang.org/doc/install) 1.20
 
 Check out the [Terraform Documentation](https://www.terraform.io/docs/configuration/index.html) and their [Introduction](https://www.terraform.io/intro/index.html) for more information on terraform