Merge pull request #908 from newrelic/gosupport

docs: update supported Go information and test config

.github/workflows/compile.yml

@@ -14,6 +14,7 @@ jobs:
         go-version:
            - 1.13.x
            - 1.14.x
+           - 1.15.x
         platform:
           - ubuntu-latest
           - macos-latest

README.md

@@ -69,6 +69,16 @@ _Note:_ Acceptance tests _create real resources_, and often cost money to run. T
 $ make testacc
 ```
 
+#### Go Version Support
+
+We'll aim to support the latest supported release of Go, along with the
+previous release.  This doesn't mean that building with an older version of Go
+will not work, but we don't intend to support a Go version in this project that
+is not supported by the larger Go community.  Please see the [Go
+releases][go_releases] page for more details.
+
 [provider_docs]: https://www.terraform.io/docs/providers/newrelic/index.html
 
 [contributing]: https://github.com/newrelic/terraform-provider-newrelic/blob/master/CONTRIBUTING.md
+
+[go_releases]: https://github.com/golang/go/wiki/Go-Release-Cycle

go.mod

@@ -1,6 +1,6 @@
 module github.com/newrelic/terraform-provider-newrelic/v2
 
-go 1.13
+go 1.15
 
 require (
 	github.com/bflad/tfproviderlint v0.18.0