add support of postgres 18;

refactor version validation logic.

Signed-off-by: Dmitry Kisler <admin@dkisler.com>

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [v0.6.1] - 2024-09-28
+
+### Added
+
+- Added support of Postgres 17. See the Neon [announcement](https://neon.tech/blog/postgres-17) and the Postgres 
+  [announcement](https://www.postgresql.org/about/news/postgresql-17-released-2936/).
+
 ## [v0.6.0] - 2024-09-23
 
 ### Added

internal/provider/resource_project.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"slices"
-	"strconv"
 	"time"
 
 	"github.com/hashicorp/terraform-plugin-log/tflog"
@@ -64,15 +63,15 @@ API: https://api-docs.neon.tech/reference/createproject`,
 				ForceNew:    true,
 				Description: "Postgres version",
 				ValidateFunc: func(i interface{}, _ string) (warns []string, errs []error) {
-					switch v := i.(int); v {
-					case 14, 15, 16:
-						return
-					default:
+					supportedVersion := func(v int) bool { return v > 13 && v < 18 }
+
+					if v, ok := i.(int); !ok || !supportedVersion(v) {
 						errs = append(
-							errs, errors.New("postgres version "+strconv.Itoa(v)+" is not supported yet"),
+							errs, fmt.Errorf("postgres version %v is not supported", i),
 						)
-						return
 					}
+
+					return
 				},
 			},
 			"store_password": newStoreProjectPasswordDefault(),