EKS 1.13 out (#400)

* Update to EKS 1.13

* Revert "Pin terraform version < 0.12"

This reverts commit 4c71b12218378914c276715a85a61ac5aece9fa0.

* Update providers in examples and format

examples/basic/main.tf

@@ -11,6 +11,18 @@ provider "random" {
   version = "~> 2.1"
 }
 
+provider "local" {
+  version = "~> 1.2"
+}
+
+provider "null" {
+  version = "~> 2.1"
+}
+
+provider "template" {
+  version = "~> 2.1"
+}
+
 data "aws_availability_zones" "available" {
 }
 
@@ -131,4 +143,3 @@ module "eks" {
   map_users                            = var.map_users
   map_accounts                         = var.map_accounts
 }
-