increased golang version

Signed-off-by: Ildar Valiullin <preved.911@gmail.com>

.github/workflows/acceptance-tests.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Set up Terraform
         uses: hashicorp/setup-terraform@v1

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Import GPG key
         id: import_gpg
@@ -39,4 +39,4 @@ jobs:
           args: release --rm-dist
         env:
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/unit-tests.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Run test
         run: make test

README.md

@@ -18,7 +18,7 @@ Requirements
 ------------
 
 -	[Terraform](https://www.terraform.io/downloads.html) 0.12.x
--	[Go](https://golang.org/doc/install) 1.15 (to build the provider plugin)
+-	[Go](https://golang.org/doc/install) 1.16 (to build the provider plugin)
 
 Building The Provider
 ---------------------
@@ -46,7 +46,7 @@ Also there are lots of examples in the [selectel/terraform-examples](https://git
 Developing the Provider
 ---------------------------
 
-If you wish to work on the provider, you'll first need [Go](https://golang.org) installed on your machine (version 1.15+ is *required*).
+If you wish to work on the provider, you'll first need [Go](https://golang.org) installed on your machine (version 1.16+ is *required*).
 
 To compile the provider, run `make build`. This will build the provider and put the provider binary in the current directory.
 
@@ -80,4 +80,4 @@ build artifacts matching the [layout required](https://www.terraform.io/docs/reg
 to publish the provider in the Terraform Registry.
 
 Releases will as drafts. Once marked as published on the GitHub Releases page,
-they will become available via the Terraform Registry.
+they will become available via the Terraform Registry.

go.mod

@@ -1,6 +1,6 @@
 module github.com/terraform-providers/terraform-provider-selectel
 
-go 1.15
+go 1.16
 
 require (
 	github.com/hashicorp/go-retryablehttp v0.6.6