Update Go Build version (#76)

- Aligns the test and release go build version
- Allows for building for darwin arm64
- Ran `go mod tidy`

Author: benfdking

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
         name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14
+          go-version: 1.16
       -
         name: Import GPG key
         id: import_gpg

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: test
         run: make test

README.md

@@ -12,7 +12,7 @@ Requirements
 ------------
 
 -	[Terraform](https://www.terraform.io/downloads.html) 0.12.x
--	[Go](https://golang.org/doc/install) 1.14 (to build the provider plugin)
+-	[Go](https://golang.org/doc/install) 1.16 (to build the provider plugin)
 
 Building The Provider
 ---------------------